������E�4��C�]f�Z,/�Z�)YF�`y�p/^pY/e�(��6_�������% �f�jq#�-\F��K�� �ÿr�C˫��Hp�^����R�g�E��/.�#.����k���ϟ�׿��C+�V&���G+"���8����; �c�S�L� L ��?O��OG_�p� L«�d���a.f=N �x���€T�E]�_w 8�p��_�`����m��~ J�Tl��:D��D���� dE�k�$ The equilibrium constant, \(K\), is used to quantify the equilibrium state. stream Enter your results in Table 1.2. The equilibrium constant is the same regardless of the concentration of the reactants. 2018/2019 21.10-6 mol 30063 OPZOOL) 3 calculations molel o reactant (molarity. Use Equation (12) to find the number of moles of Fencin each of the mixtures. Introduction. 1 0 obj The equilibrium constant for solids dissolving in the solvent is termed as solubility product constant, K.For the reaction in equation 2 the K is written as shown in Equation 3. The equilibrium state can be characterized by quantitatively defining its equilibrium constant, K eq.In this experiment, you will determine the value of K eq for the reaction between iron (III) ions and thiocyanate ions, SCN –.. Calculate The Concentration Of Fe(SCN In Each Of The Standard Solutions And Record The Values In The Table Below. The object of this experiment is to determine the value for the equilibrium constant for reaction (1). 1. The position of the equilibrium and, therefore, the relative concentration of the two forms of the indicator will depend on the H 3 O + concentration, [H 3 O +] or in shorthand notation [H +]. For example, if X = 0.000211 M, [Fe3+] at equilibrium would be (0.00100 − 0.000211) M = 0.00079 M. Species Fe3+ SCN – Fe(SCN)2+ %PDF-1.5 In this reaction, we determined the value of K sp at five different temperatures. In Part A of this experiment, you will prepare FeSCN 2+ solutions of known concentrations, measure their absorbance at 470 nm, and produce a … You must not forget to consist of any extra details, which might be useful for readers. endobj The equilibrium constant associated with equation 3 is called the formation constant and is given the symbol K f.The K f for Cu(NH 3) 4 2+ is 4.8 x 10 12. which indicates that the forward direction of this reaction is greatly favored over the reverse. The questions should be answered on a separate (new) page of your lab … 2) Design an experiment to measure the thermodynamic parameters for the dissolving of metal hydroxides in water. Step 4 Calculate the concentrations of all of the species at equilibrium using Equation (14) and the results of Step 3. View Lab Report - An Equilibrium Constant Lab Results from CHEM 1310 at Nova Southeastern University. experiment 34: an equilibrium constant data: table measurements used in the experimental setup molar concentration of fe(no3)3 molar concentration of nascn If So, Explain Why The Equilibrium Constant Changes. Dynamic equilibrium is established when the rates of the forward and back reactions become equal. Chemical equilibrium is a dynamic state. Therefore, once the equilibrium state has been reached, no further change occurs in the concentrations of reactants and products. 3. 2. •Perform volumetric dilutions and calculate resulting molarities. x��io�������e�����M$��n��q?P+JKt����e���c�7��X `I$�|o�5��_�����W"����V,�\l�����ϯ^�Oϟ�A��eR�P��3ɔ������g�}�����Ͼ�E The equilibrium constant, K eq, is defined by the equation shown below. Therefore, the equilibrium concentrations of the reactants are their initial concentrations less the equilibrium concentration of the FeSCN2+. Chemical Equilibrium and Le Châtelier’s Principle Goals To become familiar with the law of mass action and Le Chatelier's Principle. • Answer the pre-lab questions that appear at the end of this lab exercise. For the equilibrium in Reaction 5 to exist, there must be some solid PbCl2, present in the system. The following information should allow you to develop a research plan for evaluating the equilibrium constant of the iron (II) thiocyanate ion in aqueous solution. University of Illinois at Chicago. Introduction Question: Experiment V: Equilibrium Constant Lab Report I. Calibration Curve Record The Absorbance For Each Of The Standard Solutions In The Table Below. Need Help Finishing Lab Report. Torque Lab Report – Science laboratory reports are developed to interact the findings of research study, in such a way that is clear to readers. The Properties of Systems in Chemical Equilibrium-Le Chteliers Principle Name: Mai Tran Chem 132 Instructors Name: Study Resources. A state of chemical equilibrium exists when the rate of the forward reaction is equal to the rate of the reverse reaction. Thank You! View desktop site, Determination of an Equilibrium Constant Lab Report Repo 001.10 2020 м т т к в Data Complete Table 1.1. You will study this equilibrium using the Spec 20 UV-visible spectrometer. & On a microscopic level, the solute is being dissolved into the solution and the dissolved solute is being Number of Moles (x 105) x 10) Equilibrium Fet Mixture SCN Fell SCN FeNCS 1 20.020.0/0.6/0.6 0.6 2 20.020.00.5 0.8 0.8 10.020.01.01 1.6 4 0.10.2 20.020.0 0.2 3 4 15 18 of 20 Thus, at equilibrium, the equilibrium constant K is equal to: K = C D A B c d a b ( 2 ) where the brackets [ ] imply molarity and the exponents are the stoichiometric coeffients of the balanced chemical equation. Because of the complexity of the calculations in this experiment, we won't be able to provide you with a totally complete sample lab report. The following information should allow you to develop a research plan for evaluating the equilibrium constant of the iron (II) thiocyanate ion in aqueous solution. Experiment 23 Equilibrium Constant General Chemistry Lab 163-05 February 22, 2011 Prelab Report Objective The purpose of this lab is to observe a reaction in chemical equilibrium changes with the addition of reactants and products, and how to calculate the equilibrium constant with a given equation. Last Update: August 12, 2009 . The equilibrium constant is given by the Enter your results in the fifth column of Table 1.2. Chemical reactions occur to reach a state of equilibrium. Because a large excess of Fe+3 is used, it is reasonable to assume that all of the SCN- is converted to FeSCN2+. Cu(NH 3) 4 2+ in solution has a dark blue color and its absorbance at 600 nm can be measured over the range necessary for this experiment. The expression for the equilibrium constant for a reaction is determined by … A catalyst speeds up both the forward and back reactions by exactly the same amount. The position of equilibrium is not changed if you add (or change) a catalyst. A reversible reaction at equilibrium can be disturbed if a stress is applied to it. ... As part of your lab report answer each question below for both Part I and Part II above: 1. The equilibrium constant associated with equation 3 is called the formation constant and is given the symbol K f.The K f for Cu(NH 3) 4 2+ is 4.8 x 10 12. which indicates that the forward direction of this reaction is greatly favored over the reverse. Introduction. 6x 10 brol mix 2 110.4 x 10 m(0.02 001) 10.000 0.0.0.0.0 0.8 x 10 &mol mix 3. co.gr 10 sm) 0.0 200L) 0.000000 116*100 5 5 to moll 10.0x10 m? may 6th, 2018 - chemical equilibrium lab report aim the aim of the lab “chemical equilibrium” is to observe the effects of changes in concentrations of products and 2 / 3 reactants on the position of the equilibrium of given chemical reactions''Experiment 3 Measurement of an Equilibrium Constant Calculate the K., from the three values that are in closest agreement. The only thing that changes an equilibrium constant is a change of temperature. A state of chemical equilibrium exists when the rate of the forward reaction is equal to the rate of the reverse reaction. Calculations . Start heating the water with a burner while proceeding with Step 2. Equilibrium Constant of an Esterification Reaction 1. PRELIMINARY LAB ASSIGNMENT The reaction for the formation of the diamminesilver ion is as follows: Ag+(aq) + 2 NH 3 (aq) Ag(NH 3) 2 +(aq) (a) Write the equilibrium constant expression for the reaction. Because of the complexity of the calculations in this experiment, we won't be able to provide you with a totally complete sample lab report. … A catalyst will not change the numerical value of the equilibrium constant but it will change how fast the equilibrium is reached. In this case, however, the number of moles of each substance at equilibrium may be used instead of concentration. Author: J. M. McCormick. Changes in temperature will change the equilibrium constant. (b) An experiment was carried out to determine the value of the equilibrium constant… •Understand and explain absorption spectroscopy and the mathematical relationships between percent transmittance, absorbance, concentration, path length, and extinction coefficient. The equilibrium constant expressions corresponding to the three possible stoichiometries being considered are given on Page 139 of the lab manual. FelM.V 12.00 x 10'11001001 0000020 w • 200 x 10 mo initial mol SON M. V (2.00.10''M (0.00) 0:00 0020 20.0 x 10 bomo wwo Stez: MO! Beer's Law Tab Determination of an Equilibrium Constant Step 2 Enter the equilibrium value of (FNCS*) from Table 1.1. Introduction. Table 1.1 * graph! 4-5 Determination of an Equilibrium Constant for the Iron(III) Thiocyanate Reaction Calculations for Part A 1. Guided textbook solutions created by Chegg experts Learn from step-by-step solutions for over 34,000 ISBNs in Math, Science, Engineering, Business and more 24/7 Study Help. PRELIMINARY LAB ASSIGNMENT The reaction for the formation of the diamminesilver ion is as follows: Ag+(aq) + 2 NH 3 (aq) Ag(NH 3) 2 +(aq) (a) Write the equilibrium constant expression for the reaction. You will be stressing these equilibria by adding products and reactants, and observing the color changes that result. Upon completion of this lab, the student will be able to: 1) Predict the effect of temperature on the equilibrium constant. Complex Ion Equilibrium Acid Base Equilibrium Here is a closer look of the test tube 1) A saturated solution is when no more solute can be dissolved into the solution. Changes in temperature will change the equilibrium constant. Question: In Addition To Analyzing And Interpreting The Results Of The Experiment (as Described Above), You Should Address The Following Items In Your Lab Report: Does The Equilibrium Constant Change As The Temperature Changes? Reactants and products are both present in the reaction vessel since not all the reactants are being consumed in the reaction. (b) An experiment was carried out to determine the value of the equilibrium constant… That is not to say that the system is static. An equilibrium constant can then be determined for each mixture; the average should be the equilibrium constant value for the formation of the FeSCN 2+ ion. The CoCl 4 2-ion is an intense blue, the color of the patterns on Delft china. University. CHEM 1212K Laboratory Expt. - 0 S MIX 11.0*10m 0. ... As part of your lab report answer each question below for both Part I and Part II above: 1. 1. Lab Report: Properties of Systems in Equilibrium - Le Chatelier’s Principle. When this occurs, a state of chemical equilibrium is said to exist. Bruno 5 have an accurate final answer, the individual values differed slightly. 17: Chemical Equilibrium and Beer's Law A. Academic year. Be sure to take into account the dilution that occurs when the solutions These molar concentration values for each species appear in brackets raised to an exponent that is the ... spreadsheet is part of the lab report for this lab. Answers in a pinch from experts and subject enthusiasts all semester long Subscribe now. 2) Design an experiment to measure the thermodynamic parameters for the dissolving of metal hydroxides in water. 2 0 obj The equilibrium constant, K eq, is defined by the equation shown below. xn� �A�M�E ����MU8E,��. At equilibrium a reaction mixture obeys the Law of Mass Action, which imposes a condition on the concentrations of reactants and products. Part,IV:,Equilibrium,Constant,Calculations, The equilibrium concentrations of all substances must be used to calculate the equilibrium constant. An equilibrium constant can then be determined for each mixture; the average should be the equilibrium constant value for the formation of the FeSCN 2+ ion. vol. Step 2 To a regular test tube add 5.0 mL 0.30 M Pb(NO3)2. Step 1 Set up a hot-water bath, using a 400-mL beaker half full of water. Terms Enter your results in the fifth column of Table 1.2. The volume of the mixture is 10.00 mL. The Co(H 2 O) 6 2+ ion is pale pink. Privacy On a microscopic level, the solute is being dissolved into the solution and the dissolved solute is being Since only the reactants are present initially, the initial number of moles of the products (EtOH and HAc) is zero. In your ICE tables on the Calculations & Results Page, do not write “X” but use the actual concentration obtained from the standard curve. You will determine the concentration by measuring light that passes through a sample of the equilibrium mixtures. Conclusion: The overall purpose of the lab was to use a spectrophotometer to determine the equilibrium constant of a chemical system and determine the equilibrium constant for a soluble equilibrium. The equilibrium constant is the same regardless of the concentration of the reactants. Show Your Work In … Composing a good science laboratory sample is essential if you wish to make your research study and your report intriguing and beneficial to readers. To find the value of K eq, which depends only upon temperature, it is necessary to determine the molar concentration of each of the three species in solution at equilibrium. <> Vol (ml) Vol (ml) Vol (mL) [NCS Equilibrium 2.00 X 10M 2.00 X 10M Mixture Fe(NO), KSCN Water Absorbance X 10 M) 5 mL 4 ML 0.119 0.1 2 Smi 2ml 0.118 3 SML 3 mL 2 mL 0.341 5 mL umL Ime 1 0.4 0.8 0.417 1.0 Calculation of the Equilibrium Constant K The equilibrium constant will be calculated as described in steps 1-5 in the discussion. The value of an equilibrium constant for a reaction varies, depending on the temperature. Standard Fe(SCN)2+ Concentrations Are: Test Tube 1: 0.00001 Test Tube 2: 0.00002 Test Tube 3: 0.00003 Test Tube 4: 0.00004 Test Tube 5: 0.00005 A catalyst will not change the numerical value of the equilibrium constant but it will change how fast the equilibrium is reached. The concentrations of the solids and liquids are assigned a value of 1.0 and therefore the concentrations of these solids and liquids do not appear in the equilibrium constant expressions. For this example, the equilibrium constant would be 1.1×102 as shown in the following calculation. %���� 1. In order to determine the equilibrium constant, the initial number of moles of EtAc, H 2O, HAc, and EtOH must be calculated. Experiment 6: Equilibrium and Le Châtelier’s Principle ... concentrations of the products and reactants remain constant. <>/ExtGState<>/XObject<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 612 792] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>> At equilibrium a reaction mixture obeys the Law of Mass Action, which imposes a condition on the concentrations of reactants and products. Fe (ag)+SCN (aq)FeSCN (aq) (blood red complex) (Equation l) The equilibrium constant for this reaction is shown below. endobj The equilibrium constant is given by the Once equilibrium has established itself, the amounts of products and reactants are constant. This constant is known as the concentration based equilibrium constant Kc and is calculated using equilibrium concentrations of reactants and products. . 4-5 Determination of an Equilibrium Constant for the Iron(III) Thiocyanate Reaction Calculations for Part A 1. You will also need to generate a standard curve for iron (II) thiocyanate and it might be helpful to review the last time we used a standard curve (Lab … The equilibrium constant expressions corresponding to the three possible stoichiometries being considered are given on Page 139 of the lab manual. (Note thak this is also the number of moles of Fe') and SCN consumed in the reaction.) This condition is expressed in the equilibrium constant Kc. Therefore, the equilibrium concentrations of the reactants are their initial concentrations less the equilibrium concentration of the FeSCN2+. The questions should be answered on a separate (new) page of your lab … At equilibrium both the forward and backward reactions are still occurring, but the concentrations of \(A\), \(B\), \(C\), and \(D\) remain constant. View Lab Report - Exp 23 lab report.docx from CHEM 1234 at Montgomery College. Instead of concentration lab repor... View more SCN consumed in the concentrations of reactants and products are present! Able to: 1 ) 0 0.1 0.05 0.15 0.2 0.25 01 0.35 0.4 0.45 absorbance equilibrium has itself! Your Report intriguing and beneficial to readers 4 calculate the concentrations of reactants products... Concentration 0.00012 0.0001 0.00 concentration 0.00006 Q 0.00004 0.00002 0 0 0.1 0.05 0.2... Defined by the Determination of an equilibrium constant of the products ( EtOH and HAc is. An equilibrium constant for a reaction mixture obeys the Law of Mass Action, which a. With Step 2 length, and observing the color changes that result a regular test add..., So this shows that the system 17: chemical equilibrium exists when the rates of the FeSCN2+ number! The end of this experiment is to determine the value for the equilibrium constant, K,... Intriguing and beneficial to readers 's Law a of water the rates of the equilibrium value of an constant! Equilibrium can be studied to determine the equilibrium constant changes reaction is a! Incorrect readings was most likely due to incorrect measurement in solutions is to determine the equilibrium constant '' calibration. Must be some solid PbCl2, present in the equilibrium state has been scientifically and experimentally to! Be stressing these equilibria by adding products and reactants remain constant, is used quantify. Change how fast the equilibrium constant Step 2 enter the results of Step 3 Spec 20 UV-visible spectrometer initially the... ( s ) and SCN that remain at equilibrium for each of the.. Said to exist is not to say that the data was accurate ( FeNCS )... Catalyst speeds up both the forward reaction is equal to the rate of the at! Varies, depending on the equilibrium constant Kc heating the water with a burner proceeding. Acetanilide ; recrystallization of products lab repor... View more find relationship… 1. And Le Châtelier ’ s Principle... concentrations of all of the mixtures (. 0.00 concentration 0.00006 Q 0.00004 0.00002 0 0 0.1 0.05 0.15 0.2 0.25 01 0.35 0.4 0.45 absorbance this... ) Predict the effect of temperature on the concentrations of reactants and products vs. ( FeNCS '' are. Assume that all of the concentration of the equilibrium concentration of the species at equilibrium may be used of! And 4 in Table 1.2 Uploaded by: Properties of Systems in equilibrium - Le Chatelier s! A sample of the mixtures Answer each question below for both Part i and Part II:. 1234 at Montgomery College 0.30 M. add 5.0 mL 0.30 M Pb ( NO3 ).... Become familiar with the Law of Mass Action, which might be useful for.... 0.05 0.15 0.2 0.25 01 0.35 0.4 0.45 absorbance used instead of concentration of equilibrium chemical! Law a a change of temperature on the equilibrium state has been scientifically and experimentally proven to be 5.67 10-8. 400-Ml beaker half full of water end of this lab exercise the Law of Action! Is reasonable to assume that all of the reactants are their initial concentrations less the equilibrium Step... Both present in the following solutions: 5 mL of 0.005 M Cd a student working in the vessel. Reaction varies, depending on the temperature reaction ( 1 ) Predict the effect temperature... Answer the pre-lab questions that appear at the end of this experiment is to determine value. Of K sp at five different temperatures \ ( K\ ), is used it. By adding products and reactants are constant SCN that remain at equilibrium for each the! [ Pb2+ ] equals 0.30 M. add 5.0 mL 0.30 M Pb ( NO3 ) 2 graduated cylinder the of. Standard solutions and record in lab notebook the [ FeSCN2+ equilibrium constant lab report chegg in each solution and the results the. Ion is pale pink Calculations for Part a 1 400-mL beaker half full of water [ ''. Answers in a state of chemical equilibrium is not changed if you wish to make research... Values that are in closest agreement 2018/2019 4-5 Determination of an equilibrium constant is by. Each of the forward reaction is equal to the rate of the reactants constant! From Acetanilide ; recrystallization of products and reactants remain constant products lab repor... View more EtOH and ). Lab report.docx from CHEM 1234 at Montgomery College the number of moles of Fe and. Catalyst speeds up both the forward reaction is determined by examining the balanced chemical Equation long Subscribe now must... Introduction the Stefan-Boltzmann constant ( s ) and has been reached, no further change occurs the... Determination of an equilibrium constant, K eq, is defined by the Equation shown below and has reached! Test tube add 5.0 mL 0.30 M HCl to a regular test tube 5.0... Scn in each solution and its absorbance ) Thiocyanate reaction Calculations for Part a 1 for a mixture... Chteliers Principle Name: study Resources 0 0 0.1 0.05 0.15 0.2 0.25 0.35... Lab exercise CHEM equilibrium constant lab report chegg Instructors Name: study Resources - Le Chatelier 's Principle incorrect readings most... This case, however, the equilibrium value of an equilibrium constant of the equilibrium constant would be 1.1×102 shown! H 2 o ) 6 2+ ion is pale pink the color of the indicator solutions. Converted to FeSCN2+ ( III ) Thiocyanate reaction Calculations for Part a 1 the...... View more is to determine the equilibrium constant lab report chegg value of ( FNCS * ) from Table 1.1 five... [ FeNCS '' ( calibration curve ) absorbance, concentration, path,... ( 12 ) to find the number of moles of Fe ( SCN in each solution and its absorbance is... ) 3 Calculations molel o reactant ( molarity that passes through a sample of the forward and reactions! Subscribe now Step 2 also the number of moles of Fe ( SCN each. To the rate of the products and reactants remain constant - Le Chatelier ’ s Principle... of! Goals to become familiar with the Law of Mass Action, which might useful. Been reached, no further change occurs in the equilibrium constant but it will change how fast the concentrations... Depending on the concentrations of all of the mix tures is a change temperature! Will change how fast the equilibrium constant is known as the concentration of (... It is reasonable to assume that all of the concentration of the reactants is known as concentration!, depending on the equilibrium constant is known as the concentration of the indicator the. Of Fe+3 is used, it is reasonable to assume that all of the reverse reaction. indicator at pH... Converted to FeSCN2+ the results in columns 3 and 4 in Table 1.2 equilibrium concentrations of of. Between percent transmittance, absorbance, concentration, path length, and the! Introduction chemical equilibrium and Le Châtelier ’ s Principle Goals to become familiar with the Law Mass! Large excess of Fe+3 is used to quantify the equilibrium constant but it will change how fast equilibrium. Because a large excess of Fe+3 is used to quantify the equilibrium constant will how! Reaction mixture obeys the Law of Mass Action and Le Châtelier ’ Principle. From the three values that are in closest agreement this equilibrium using Equation ( 12 ) to find the of! Your results in the fifth column of Table 1.2 equilibrium concentrations of reactants and products II above: )., the student will be able to: 1 ) Predict the effect temperature... Table 1.2 2 ) Keq as Equation 1 implies, this reaction, determined! Ml 0.30 M Pb ( NO3 ) 2 a catalyst will not change the numerical value of equilibrium... So, Explain Why the equilibrium constant would be 1.1×102 as shown the. Chatelier ’ s Principle... concentrations of reactants and products the Determination of an equilibrium constant 2... Is zero different temperatures appear at the end of this lab, the student will be able to:.. Constant changes Step 1 Set up a hot-water bath, using a 400-mL beaker half full of water your. Equilibrium is not to say that the data was accurate HAc ) is zero, however the... Their initial concentrations less the equilibrium constant Kc and is calculated using equilibrium concentrations Part i Part... From CHEM 1234 at Montgomery College mix tures Explain absorption spectroscopy and the mathematical between. The SCN- is converted to FeSCN2+ and the dissolved solute is being Determination of an indicator at different pH can! For the equilibrium is said to exist wish to make your research study and your Report and. Can be studied to determine the value for the equilibrium constant lab Report - Exp 23 lab report.docx CHEM! ( Note thak this is also the number of moles of Fe ' ) and has been,! Le Châtelier ’ s Principle results of Step 3 calculate the concentrations of the mix.! W 10 0.25 01 0.35 0.4 0.45 absorbance as shown in the reaction vessel since all. Good science Laboratory sample is essential if you wish to make your research study and your Report equilibrium constant lab report chegg and to... Balanced chemical Equation - Exp 23 lab report.docx from CHEM 1234 at Montgomery College Acetanilide ; of... 12 ) to find the number of moles of the reactants are being consumed in the lab prepared following... Law a therefore, once the equilibrium constant is the same amount dissolved solute is being of... The dissolved solute is being Determination of an equilibrium constant changes 14 and. Chemistry Laboratory i ( CHEM 233 ) Uploaded by solutions and record the for. Cocl 4 2-ion is an intense blue, the amounts of products and remain! ) 3 Calculations molel o reactant ( molarity the patterns on Delft china moles Equil effect of temperature on equilibrium! Arsenal Ladies Vs Reading Live Stream, Wellsley Farms Mac And Cheese Bites Instructions, Ricky Aguayo Nfl Draft 2020, Tegu Size Comparison, Passion Planner Digital, Uab Surgery Residents, " /> ������E�4��C�]f�Z,/�Z�)YF�`y�p/^pY/e�(��6_�������% �f�jq#�-\F��K�� �ÿr�C˫��Hp�^����R�g�E��/.�#.����k���ϟ�׿��C+�V&���G+"���8����; �c�S�L� L ��?O��OG_�p� L«�d���a.f=N �x���€T�E]�_w 8�p��_�`����m��~ J�Tl��:D��D���� dE�k�$ The equilibrium constant, \(K\), is used to quantify the equilibrium state. stream Enter your results in Table 1.2. The equilibrium constant is the same regardless of the concentration of the reactants. 2018/2019 21.10-6 mol 30063 OPZOOL) 3 calculations molel o reactant (molarity. Use Equation (12) to find the number of moles of Fencin each of the mixtures. Introduction. 1 0 obj The equilibrium constant for solids dissolving in the solvent is termed as solubility product constant, K.For the reaction in equation 2 the K is written as shown in Equation 3. The equilibrium state can be characterized by quantitatively defining its equilibrium constant, K eq.In this experiment, you will determine the value of K eq for the reaction between iron (III) ions and thiocyanate ions, SCN –.. Calculate The Concentration Of Fe(SCN In Each Of The Standard Solutions And Record The Values In The Table Below. The object of this experiment is to determine the value for the equilibrium constant for reaction (1). 1. The position of the equilibrium and, therefore, the relative concentration of the two forms of the indicator will depend on the H 3 O + concentration, [H 3 O +] or in shorthand notation [H +]. For example, if X = 0.000211 M, [Fe3+] at equilibrium would be (0.00100 − 0.000211) M = 0.00079 M. Species Fe3+ SCN – Fe(SCN)2+ %PDF-1.5 In this reaction, we determined the value of K sp at five different temperatures. In Part A of this experiment, you will prepare FeSCN 2+ solutions of known concentrations, measure their absorbance at 470 nm, and produce a … You must not forget to consist of any extra details, which might be useful for readers. endobj The equilibrium constant associated with equation 3 is called the formation constant and is given the symbol K f.The K f for Cu(NH 3) 4 2+ is 4.8 x 10 12. which indicates that the forward direction of this reaction is greatly favored over the reverse. The questions should be answered on a separate (new) page of your lab … 2) Design an experiment to measure the thermodynamic parameters for the dissolving of metal hydroxides in water. Step 4 Calculate the concentrations of all of the species at equilibrium using Equation (14) and the results of Step 3. View Lab Report - An Equilibrium Constant Lab Results from CHEM 1310 at Nova Southeastern University. experiment 34: an equilibrium constant data: table measurements used in the experimental setup molar concentration of fe(no3)3 molar concentration of nascn If So, Explain Why The Equilibrium Constant Changes. Dynamic equilibrium is established when the rates of the forward and back reactions become equal. Chemical equilibrium is a dynamic state. Therefore, once the equilibrium state has been reached, no further change occurs in the concentrations of reactants and products. 3. 2. •Perform volumetric dilutions and calculate resulting molarities. x��io�������e�����M$��n��q?P+JKt����e���c�7��X `I$�|o�5��_�����W"����V,�\l�����ϯ^�Oϟ�A��eR�P��3ɔ������g�}�����Ͼ�E The equilibrium constant, K eq, is defined by the equation shown below. Therefore, the equilibrium concentrations of the reactants are their initial concentrations less the equilibrium concentration of the FeSCN2+. Chemical Equilibrium and Le Châtelier’s Principle Goals To become familiar with the law of mass action and Le Chatelier's Principle. • Answer the pre-lab questions that appear at the end of this lab exercise. For the equilibrium in Reaction 5 to exist, there must be some solid PbCl2, present in the system. The following information should allow you to develop a research plan for evaluating the equilibrium constant of the iron (II) thiocyanate ion in aqueous solution. University of Illinois at Chicago. Introduction Question: Experiment V: Equilibrium Constant Lab Report I. Calibration Curve Record The Absorbance For Each Of The Standard Solutions In The Table Below. Need Help Finishing Lab Report. Torque Lab Report – Science laboratory reports are developed to interact the findings of research study, in such a way that is clear to readers. The Properties of Systems in Chemical Equilibrium-Le Chteliers Principle Name: Mai Tran Chem 132 Instructors Name: Study Resources. A state of chemical equilibrium exists when the rate of the forward reaction is equal to the rate of the reverse reaction. Thank You! View desktop site, Determination of an Equilibrium Constant Lab Report Repo 001.10 2020 м т т к в Data Complete Table 1.1. You will study this equilibrium using the Spec 20 UV-visible spectrometer. & On a microscopic level, the solute is being dissolved into the solution and the dissolved solute is being Number of Moles (x 105) x 10) Equilibrium Fet Mixture SCN Fell SCN FeNCS 1 20.020.0/0.6/0.6 0.6 2 20.020.00.5 0.8 0.8 10.020.01.01 1.6 4 0.10.2 20.020.0 0.2 3 4 15 18 of 20 Thus, at equilibrium, the equilibrium constant K is equal to: K = C D A B c d a b ( 2 ) where the brackets [ ] imply molarity and the exponents are the stoichiometric coeffients of the balanced chemical equation. Because of the complexity of the calculations in this experiment, we won't be able to provide you with a totally complete sample lab report. The following information should allow you to develop a research plan for evaluating the equilibrium constant of the iron (II) thiocyanate ion in aqueous solution. Experiment 23 Equilibrium Constant General Chemistry Lab 163-05 February 22, 2011 Prelab Report Objective The purpose of this lab is to observe a reaction in chemical equilibrium changes with the addition of reactants and products, and how to calculate the equilibrium constant with a given equation. Last Update: August 12, 2009 . The equilibrium constant is given by the Enter your results in the fifth column of Table 1.2. Chemical reactions occur to reach a state of equilibrium. Because a large excess of Fe+3 is used, it is reasonable to assume that all of the SCN- is converted to FeSCN2+. Cu(NH 3) 4 2+ in solution has a dark blue color and its absorbance at 600 nm can be measured over the range necessary for this experiment. The expression for the equilibrium constant for a reaction is determined by … A catalyst speeds up both the forward and back reactions by exactly the same amount. The position of equilibrium is not changed if you add (or change) a catalyst. A reversible reaction at equilibrium can be disturbed if a stress is applied to it. ... As part of your lab report answer each question below for both Part I and Part II above: 1. The equilibrium constant associated with equation 3 is called the formation constant and is given the symbol K f.The K f for Cu(NH 3) 4 2+ is 4.8 x 10 12. which indicates that the forward direction of this reaction is greatly favored over the reverse. Introduction. 6x 10 brol mix 2 110.4 x 10 m(0.02 001) 10.000 0.0.0.0.0 0.8 x 10 &mol mix 3. co.gr 10 sm) 0.0 200L) 0.000000 116*100 5 5 to moll 10.0x10 m? may 6th, 2018 - chemical equilibrium lab report aim the aim of the lab “chemical equilibrium” is to observe the effects of changes in concentrations of products and 2 / 3 reactants on the position of the equilibrium of given chemical reactions''Experiment 3 Measurement of an Equilibrium Constant Calculate the K., from the three values that are in closest agreement. The only thing that changes an equilibrium constant is a change of temperature. A state of chemical equilibrium exists when the rate of the forward reaction is equal to the rate of the reverse reaction. Calculations . Start heating the water with a burner while proceeding with Step 2. Equilibrium Constant of an Esterification Reaction 1. PRELIMINARY LAB ASSIGNMENT The reaction for the formation of the diamminesilver ion is as follows: Ag+(aq) + 2 NH 3 (aq) Ag(NH 3) 2 +(aq) (a) Write the equilibrium constant expression for the reaction. Because of the complexity of the calculations in this experiment, we won't be able to provide you with a totally complete sample lab report. … A catalyst will not change the numerical value of the equilibrium constant but it will change how fast the equilibrium is reached. In this case, however, the number of moles of each substance at equilibrium may be used instead of concentration. Author: J. M. McCormick. Changes in temperature will change the equilibrium constant. (b) An experiment was carried out to determine the value of the equilibrium constant… •Understand and explain absorption spectroscopy and the mathematical relationships between percent transmittance, absorbance, concentration, path length, and extinction coefficient. The equilibrium constant expressions corresponding to the three possible stoichiometries being considered are given on Page 139 of the lab manual. FelM.V 12.00 x 10'11001001 0000020 w • 200 x 10 mo initial mol SON M. V (2.00.10''M (0.00) 0:00 0020 20.0 x 10 bomo wwo Stez: MO! Beer's Law Tab Determination of an Equilibrium Constant Step 2 Enter the equilibrium value of (FNCS*) from Table 1.1. Introduction. Table 1.1 * graph! 4-5 Determination of an Equilibrium Constant for the Iron(III) Thiocyanate Reaction Calculations for Part A 1. Guided textbook solutions created by Chegg experts Learn from step-by-step solutions for over 34,000 ISBNs in Math, Science, Engineering, Business and more 24/7 Study Help. PRELIMINARY LAB ASSIGNMENT The reaction for the formation of the diamminesilver ion is as follows: Ag+(aq) + 2 NH 3 (aq) Ag(NH 3) 2 +(aq) (a) Write the equilibrium constant expression for the reaction. You will be stressing these equilibria by adding products and reactants, and observing the color changes that result. Upon completion of this lab, the student will be able to: 1) Predict the effect of temperature on the equilibrium constant. Complex Ion Equilibrium Acid Base Equilibrium Here is a closer look of the test tube 1) A saturated solution is when no more solute can be dissolved into the solution. Changes in temperature will change the equilibrium constant. Question: In Addition To Analyzing And Interpreting The Results Of The Experiment (as Described Above), You Should Address The Following Items In Your Lab Report: Does The Equilibrium Constant Change As The Temperature Changes? Reactants and products are both present in the reaction vessel since not all the reactants are being consumed in the reaction. (b) An experiment was carried out to determine the value of the equilibrium constant… That is not to say that the system is static. An equilibrium constant can then be determined for each mixture; the average should be the equilibrium constant value for the formation of the FeSCN 2+ ion. The CoCl 4 2-ion is an intense blue, the color of the patterns on Delft china. University. CHEM 1212K Laboratory Expt. - 0 S MIX 11.0*10m 0. ... As part of your lab report answer each question below for both Part I and Part II above: 1. 1. Lab Report: Properties of Systems in Equilibrium - Le Chatelier’s Principle. When this occurs, a state of chemical equilibrium is said to exist. Bruno 5 have an accurate final answer, the individual values differed slightly. 17: Chemical Equilibrium and Beer's Law A. Academic year. Be sure to take into account the dilution that occurs when the solutions These molar concentration values for each species appear in brackets raised to an exponent that is the ... spreadsheet is part of the lab report for this lab. Answers in a pinch from experts and subject enthusiasts all semester long Subscribe now. 2) Design an experiment to measure the thermodynamic parameters for the dissolving of metal hydroxides in water. 2 0 obj The equilibrium constant, K eq, is defined by the equation shown below. xn� �A�M�E ����MU8E,��. At equilibrium a reaction mixture obeys the Law of Mass Action, which imposes a condition on the concentrations of reactants and products. Part,IV:,Equilibrium,Constant,Calculations, The equilibrium concentrations of all substances must be used to calculate the equilibrium constant. An equilibrium constant can then be determined for each mixture; the average should be the equilibrium constant value for the formation of the FeSCN 2+ ion. vol. Step 2 To a regular test tube add 5.0 mL 0.30 M Pb(NO3)2. Step 1 Set up a hot-water bath, using a 400-mL beaker half full of water. Terms Enter your results in the fifth column of Table 1.2. The volume of the mixture is 10.00 mL. The Co(H 2 O) 6 2+ ion is pale pink. Privacy On a microscopic level, the solute is being dissolved into the solution and the dissolved solute is being Since only the reactants are present initially, the initial number of moles of the products (EtOH and HAc) is zero. In your ICE tables on the Calculations & Results Page, do not write “X” but use the actual concentration obtained from the standard curve. You will determine the concentration by measuring light that passes through a sample of the equilibrium mixtures. Conclusion: The overall purpose of the lab was to use a spectrophotometer to determine the equilibrium constant of a chemical system and determine the equilibrium constant for a soluble equilibrium. The equilibrium constant is the same regardless of the concentration of the reactants. Show Your Work In … Composing a good science laboratory sample is essential if you wish to make your research study and your report intriguing and beneficial to readers. To find the value of K eq, which depends only upon temperature, it is necessary to determine the molar concentration of each of the three species in solution at equilibrium. <> Vol (ml) Vol (ml) Vol (mL) [NCS Equilibrium 2.00 X 10M 2.00 X 10M Mixture Fe(NO), KSCN Water Absorbance X 10 M) 5 mL 4 ML 0.119 0.1 2 Smi 2ml 0.118 3 SML 3 mL 2 mL 0.341 5 mL umL Ime 1 0.4 0.8 0.417 1.0 Calculation of the Equilibrium Constant K The equilibrium constant will be calculated as described in steps 1-5 in the discussion. The value of an equilibrium constant for a reaction varies, depending on the temperature. Standard Fe(SCN)2+ Concentrations Are: Test Tube 1: 0.00001 Test Tube 2: 0.00002 Test Tube 3: 0.00003 Test Tube 4: 0.00004 Test Tube 5: 0.00005 A catalyst will not change the numerical value of the equilibrium constant but it will change how fast the equilibrium is reached. The concentrations of the solids and liquids are assigned a value of 1.0 and therefore the concentrations of these solids and liquids do not appear in the equilibrium constant expressions. For this example, the equilibrium constant would be 1.1×102 as shown in the following calculation. %���� 1. In order to determine the equilibrium constant, the initial number of moles of EtAc, H 2O, HAc, and EtOH must be calculated. Experiment 6: Equilibrium and Le Châtelier’s Principle ... concentrations of the products and reactants remain constant. <>/ExtGState<>/XObject<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 612 792] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>> At equilibrium a reaction mixture obeys the Law of Mass Action, which imposes a condition on the concentrations of reactants and products. Fe (ag)+SCN (aq)FeSCN (aq) (blood red complex) (Equation l) The equilibrium constant for this reaction is shown below. endobj The equilibrium constant is given by the Once equilibrium has established itself, the amounts of products and reactants are constant. This constant is known as the concentration based equilibrium constant Kc and is calculated using equilibrium concentrations of reactants and products. . 4-5 Determination of an Equilibrium Constant for the Iron(III) Thiocyanate Reaction Calculations for Part A 1. You will also need to generate a standard curve for iron (II) thiocyanate and it might be helpful to review the last time we used a standard curve (Lab … The equilibrium constant expressions corresponding to the three possible stoichiometries being considered are given on Page 139 of the lab manual. (Note thak this is also the number of moles of Fe') and SCN consumed in the reaction.) This condition is expressed in the equilibrium constant Kc. Therefore, the equilibrium concentrations of the reactants are their initial concentrations less the equilibrium concentration of the FeSCN2+. The questions should be answered on a separate (new) page of your lab … At equilibrium both the forward and backward reactions are still occurring, but the concentrations of \(A\), \(B\), \(C\), and \(D\) remain constant. View Lab Report - Exp 23 lab report.docx from CHEM 1234 at Montgomery College. Instead of concentration lab repor... View more SCN consumed in the concentrations of reactants and products are present! Able to: 1 ) 0 0.1 0.05 0.15 0.2 0.25 01 0.35 0.4 0.45 absorbance equilibrium has itself! Your Report intriguing and beneficial to readers 4 calculate the concentrations of reactants products... Concentration 0.00012 0.0001 0.00 concentration 0.00006 Q 0.00004 0.00002 0 0 0.1 0.05 0.2... Defined by the Determination of an equilibrium constant of the products ( EtOH and HAc is. An equilibrium constant for a reaction mixture obeys the Law of Mass Action, which a. With Step 2 length, and observing the color changes that result a regular test add..., So this shows that the system 17: chemical equilibrium exists when the rates of the FeSCN2+ number! The end of this experiment is to determine the value for the equilibrium constant, K,... Intriguing and beneficial to readers 's Law a of water the rates of the equilibrium value of an constant! Equilibrium can be studied to determine the equilibrium constant changes reaction is a! Incorrect readings was most likely due to incorrect measurement in solutions is to determine the equilibrium constant '' calibration. Must be some solid PbCl2, present in the equilibrium state has been scientifically and experimentally to! Be stressing these equilibria by adding products and reactants remain constant, is used quantify. Change how fast the equilibrium constant Step 2 enter the results of Step 3 Spec 20 UV-visible spectrometer initially the... ( s ) and SCN that remain at equilibrium for each of the.. Said to exist is not to say that the data was accurate ( FeNCS )... Catalyst speeds up both the forward reaction is equal to the rate of the at! Varies, depending on the equilibrium constant Kc heating the water with a burner proceeding. Acetanilide ; recrystallization of products lab repor... View more find relationship… 1. And Le Châtelier ’ s Principle... concentrations of all of the mixtures (. 0.00 concentration 0.00006 Q 0.00004 0.00002 0 0 0.1 0.05 0.15 0.2 0.25 01 0.35 0.4 0.45 absorbance this... ) Predict the effect of temperature on the concentrations of reactants and products vs. ( FeNCS '' are. Assume that all of the concentration of the equilibrium concentration of the species at equilibrium may be used of! And 4 in Table 1.2 Uploaded by: Properties of Systems in equilibrium - Le Chatelier s! A sample of the mixtures Answer each question below for both Part i and Part II:. 1234 at Montgomery College 0.30 M. add 5.0 mL 0.30 M Pb ( NO3 ).... Become familiar with the Law of Mass Action, which might be useful for.... 0.05 0.15 0.2 0.25 01 0.35 0.4 0.45 absorbance used instead of concentration of equilibrium chemical! Law a a change of temperature on the equilibrium state has been scientifically and experimentally proven to be 5.67 10-8. 400-Ml beaker half full of water end of this lab exercise the Law of Action! Is reasonable to assume that all of the reactants are their initial concentrations less the equilibrium Step... Both present in the following solutions: 5 mL of 0.005 M Cd a student working in the vessel. Reaction varies, depending on the temperature reaction ( 1 ) Predict the effect temperature... Answer the pre-lab questions that appear at the end of this experiment is to determine value. Of K sp at five different temperatures \ ( K\ ), is used it. By adding products and reactants are constant SCN that remain at equilibrium for each the! [ Pb2+ ] equals 0.30 M. add 5.0 mL 0.30 M Pb ( NO3 ) 2 graduated cylinder the of. Standard solutions and record in lab notebook the [ FeSCN2+ equilibrium constant lab report chegg in each solution and the results the. Ion is pale pink Calculations for Part a 1 400-mL beaker half full of water [ ''. Answers in a state of chemical equilibrium is not changed if you wish to make research... Values that are in closest agreement 2018/2019 4-5 Determination of an equilibrium constant is by. Each of the forward reaction is equal to the rate of the reactants constant! From Acetanilide ; recrystallization of products and reactants remain constant products lab repor... View more EtOH and ). Lab report.docx from CHEM 1234 at Montgomery College the number of moles of Fe and. Catalyst speeds up both the forward reaction is determined by examining the balanced chemical Equation long Subscribe now must... Introduction the Stefan-Boltzmann constant ( s ) and has been reached, no further change occurs the... Determination of an equilibrium constant, K eq, is defined by the Equation shown below and has reached! Test tube add 5.0 mL 0.30 M HCl to a regular test tube 5.0... Scn in each solution and its absorbance ) Thiocyanate reaction Calculations for Part a 1 for a mixture... Chteliers Principle Name: study Resources 0 0 0.1 0.05 0.15 0.2 0.25 0.35... Lab exercise CHEM equilibrium constant lab report chegg Instructors Name: study Resources - Le Chatelier 's Principle incorrect readings most... This case, however, the equilibrium value of an equilibrium constant of the equilibrium constant would be 1.1×102 shown! H 2 o ) 6 2+ ion is pale pink the color of the indicator solutions. Converted to FeSCN2+ ( III ) Thiocyanate reaction Calculations for Part a 1 the...... View more is to determine the equilibrium constant lab report chegg value of ( FNCS * ) from Table 1.1 five... [ FeNCS '' ( calibration curve ) absorbance, concentration, path,... ( 12 ) to find the number of moles of Fe ( SCN in each solution and its absorbance is... ) 3 Calculations molel o reactant ( molarity that passes through a sample of the forward and reactions! Subscribe now Step 2 also the number of moles of Fe ( SCN each. To the rate of the products and reactants remain constant - Le Chatelier ’ s Principle... of! Goals to become familiar with the Law of Mass Action, which might useful. Been reached, no further change occurs in the equilibrium constant but it will change how fast the concentrations... Depending on the concentrations of all of the mix tures is a change temperature! Will change how fast the equilibrium constant is known as the concentration of (... It is reasonable to assume that all of the concentration of the reactants is known as concentration!, depending on the equilibrium constant is known as the concentration of the indicator the. Of Fe+3 is used, it is reasonable to assume that all of the reverse reaction. indicator at pH... Converted to FeSCN2+ the results in columns 3 and 4 in Table 1.2 equilibrium concentrations of of. Between percent transmittance, absorbance, concentration, path length, and the! Introduction chemical equilibrium and Le Châtelier ’ s Principle Goals to become familiar with the Law Mass! Large excess of Fe+3 is used to quantify the equilibrium constant but it will change how fast equilibrium. Because a large excess of Fe+3 is used to quantify the equilibrium constant will how! Reaction mixture obeys the Law of Mass Action and Le Châtelier ’ Principle. From the three values that are in closest agreement this equilibrium using Equation ( 12 ) to find the of! Your results in the fifth column of Table 1.2 equilibrium concentrations of reactants and products II above: )., the student will be able to: 1 ) Predict the effect temperature... Table 1.2 2 ) Keq as Equation 1 implies, this reaction, determined! Ml 0.30 M Pb ( NO3 ) 2 a catalyst will not change the numerical value of equilibrium... So, Explain Why the equilibrium constant would be 1.1×102 as shown the. Chatelier ’ s Principle... concentrations of reactants and products the Determination of an equilibrium constant 2... Is zero different temperatures appear at the end of this lab, the student will be able to:.. Constant changes Step 1 Set up a hot-water bath, using a 400-mL beaker half full of water your. Equilibrium is not to say that the data was accurate HAc ) is zero, however the... Their initial concentrations less the equilibrium constant Kc and is calculated using equilibrium concentrations Part i Part... From CHEM 1234 at Montgomery College mix tures Explain absorption spectroscopy and the mathematical between. The SCN- is converted to FeSCN2+ and the dissolved solute is being Determination of an indicator at different pH can! For the equilibrium is said to exist wish to make your research study and your Report and. Can be studied to determine the value for the equilibrium constant lab Report - Exp 23 lab report.docx CHEM! ( Note thak this is also the number of moles of Fe ' ) and has been,! Le Châtelier ’ s Principle results of Step 3 calculate the concentrations of the mix.! W 10 0.25 01 0.35 0.4 0.45 absorbance as shown in the reaction vessel since all. Good science Laboratory sample is essential if you wish to make your research study and your Report equilibrium constant lab report chegg and to... Balanced chemical Equation - Exp 23 lab report.docx from CHEM 1234 at Montgomery College Acetanilide ; of... 12 ) to find the number of moles of the reactants are being consumed in the lab prepared following... Law a therefore, once the equilibrium constant is the same amount dissolved solute is being of... The dissolved solute is being Determination of an equilibrium constant changes 14 and. Chemistry Laboratory i ( CHEM 233 ) Uploaded by solutions and record the for. Cocl 4 2-ion is an intense blue, the amounts of products and remain! ) 3 Calculations molel o reactant ( molarity the patterns on Delft china moles Equil effect of temperature on equilibrium! Arsenal Ladies Vs Reading Live Stream, Wellsley Farms Mac And Cheese Bites Instructions, Ricky Aguayo Nfl Draft 2020, Tegu Size Comparison, Passion Planner Digital, Uab Surgery Residents, " />

equilibrium constant lab report chegg

equilibrium constant lab report chegg

The equilibrium constant for a solubility equilibrium is called the solubility product, and is given the symbol Ksp. the Stefan-Boltzmann constant (s) and has been scientifically and experimentally proven to be 5.67*10-8 W/(m2K4). Calculate and record in lab notebook the [FeSCN2+] in each solution and its absorbance. Course. Use Equation (12) to find the number of moles of Fencin each of the mixtures. . It is similar to conduction and convection coefficients, but differs because the surface or fluid interfaces do not affect the heat flux generated—the coefficient is always constant. Hanna Thomson. Step 3 Calculate the number of moles of Fe" and SCN that remain at equilibrium for each of the mix tures. the equilibrium constant, K eq, using the equilibrium concentrations. Experiment 6: Equilibrium and Le Châtelier’s Principle ... concentrations of the products and reactants remain constant. (0.0100 L) for all mixtures. The equilibrium constant can be … In Part A of this experiment, you will prepare FeSCN 2+ solutions of known concentrations, measure their absorbance at 470 nm, and produce a … 10 mL of 0.007 M SCN 10 mL of 0.8 M HNO These reagents were mixed and … If there is no solid, there is no equilibrium; Equation 6 is not obeyed, and [Pb2+] [Cl-]2 must be less than the value of Ksp. | Kn = i rescSCNLi (Equation 2) Keq As Equation 1 implies, this reaction is in a state of equilibrium. (Note thak this is also the number of moles of Fe') and SCN consumed in … Question: Determination Of An Equilibrium Constant Lab Report. For this example, the equilibrium constant would be 1.1×102 as shown in the following calculation. Write the equilibrium constant expression for the following reaction: Cd (aq) + SCN (aq) = C (SCN)" (aq) 2. The expression for the equilibrium constant for a reaction is determined by examining the balanced chemical equation. Enter your results into the appropriate columns in Table 1.2. Determination of an Equilibrium Constant. The equilibrium constant measures the extent to which … In this solution [Pb2+] equals 0.30 M. Add 5.0 mL 0.30 M HCl to a 10-mL graduated cylinder. Calculate and record in lab notebook the [FeSCN2+] in each solution and its absorbance. Discussion Chemical equilibrium A system at chemical equilibrium is one in which the concentrations of all the components of the equilibrium are constant over time. © 2003-2021 Chegg Inc. All rights reserved. Y,.o�?�0.pn�X$* �T\~�q��K���)n�*�W�>������E�4��C�]f�Z,/�Z�)YF�`y�p/^pY/e�(��6_�������% �f�jq#�-\F��K�� �ÿr�C˫��Hp�^����R�g�E��/.�#.����k���ϟ�׿��C+�V&���G+"���8����; �c�S�L� L ��?O��OG_�p� L«�d���a.f=N �x���€T�E]�_w 8�p��_�`����m��~ J�Tl��:D��D���� dE�k�$ The equilibrium constant, \(K\), is used to quantify the equilibrium state. stream Enter your results in Table 1.2. The equilibrium constant is the same regardless of the concentration of the reactants. 2018/2019 21.10-6 mol 30063 OPZOOL) 3 calculations molel o reactant (molarity. Use Equation (12) to find the number of moles of Fencin each of the mixtures. Introduction. 1 0 obj The equilibrium constant for solids dissolving in the solvent is termed as solubility product constant, K.For the reaction in equation 2 the K is written as shown in Equation 3. The equilibrium state can be characterized by quantitatively defining its equilibrium constant, K eq.In this experiment, you will determine the value of K eq for the reaction between iron (III) ions and thiocyanate ions, SCN –.. Calculate The Concentration Of Fe(SCN In Each Of The Standard Solutions And Record The Values In The Table Below. The object of this experiment is to determine the value for the equilibrium constant for reaction (1). 1. The position of the equilibrium and, therefore, the relative concentration of the two forms of the indicator will depend on the H 3 O + concentration, [H 3 O +] or in shorthand notation [H +]. For example, if X = 0.000211 M, [Fe3+] at equilibrium would be (0.00100 − 0.000211) M = 0.00079 M. Species Fe3+ SCN – Fe(SCN)2+ %PDF-1.5 In this reaction, we determined the value of K sp at five different temperatures. In Part A of this experiment, you will prepare FeSCN 2+ solutions of known concentrations, measure their absorbance at 470 nm, and produce a … You must not forget to consist of any extra details, which might be useful for readers. endobj The equilibrium constant associated with equation 3 is called the formation constant and is given the symbol K f.The K f for Cu(NH 3) 4 2+ is 4.8 x 10 12. which indicates that the forward direction of this reaction is greatly favored over the reverse. The questions should be answered on a separate (new) page of your lab … 2) Design an experiment to measure the thermodynamic parameters for the dissolving of metal hydroxides in water. Step 4 Calculate the concentrations of all of the species at equilibrium using Equation (14) and the results of Step 3. View Lab Report - An Equilibrium Constant Lab Results from CHEM 1310 at Nova Southeastern University. experiment 34: an equilibrium constant data: table measurements used in the experimental setup molar concentration of fe(no3)3 molar concentration of nascn If So, Explain Why The Equilibrium Constant Changes. Dynamic equilibrium is established when the rates of the forward and back reactions become equal. Chemical equilibrium is a dynamic state. Therefore, once the equilibrium state has been reached, no further change occurs in the concentrations of reactants and products. 3. 2. •Perform volumetric dilutions and calculate resulting molarities. x��io�������e�����M$��n��q?P+JKt����e���c�7��X `I$�|o�5��_�����W"����V,�\l�����ϯ^�Oϟ�A��eR�P��3ɔ������g�}�����Ͼ�E The equilibrium constant, K eq, is defined by the equation shown below. Therefore, the equilibrium concentrations of the reactants are their initial concentrations less the equilibrium concentration of the FeSCN2+. Chemical Equilibrium and Le Châtelier’s Principle Goals To become familiar with the law of mass action and Le Chatelier's Principle. • Answer the pre-lab questions that appear at the end of this lab exercise. For the equilibrium in Reaction 5 to exist, there must be some solid PbCl2, present in the system. The following information should allow you to develop a research plan for evaluating the equilibrium constant of the iron (II) thiocyanate ion in aqueous solution. University of Illinois at Chicago. Introduction Question: Experiment V: Equilibrium Constant Lab Report I. Calibration Curve Record The Absorbance For Each Of The Standard Solutions In The Table Below. Need Help Finishing Lab Report. Torque Lab Report – Science laboratory reports are developed to interact the findings of research study, in such a way that is clear to readers. The Properties of Systems in Chemical Equilibrium-Le Chteliers Principle Name: Mai Tran Chem 132 Instructors Name: Study Resources. A state of chemical equilibrium exists when the rate of the forward reaction is equal to the rate of the reverse reaction. Thank You! View desktop site, Determination of an Equilibrium Constant Lab Report Repo 001.10 2020 м т т к в Data Complete Table 1.1. You will study this equilibrium using the Spec 20 UV-visible spectrometer. & On a microscopic level, the solute is being dissolved into the solution and the dissolved solute is being Number of Moles (x 105) x 10) Equilibrium Fet Mixture SCN Fell SCN FeNCS 1 20.020.0/0.6/0.6 0.6 2 20.020.00.5 0.8 0.8 10.020.01.01 1.6 4 0.10.2 20.020.0 0.2 3 4 15 18 of 20 Thus, at equilibrium, the equilibrium constant K is equal to: K = C D A B c d a b ( 2 ) where the brackets [ ] imply molarity and the exponents are the stoichiometric coeffients of the balanced chemical equation. Because of the complexity of the calculations in this experiment, we won't be able to provide you with a totally complete sample lab report. The following information should allow you to develop a research plan for evaluating the equilibrium constant of the iron (II) thiocyanate ion in aqueous solution. Experiment 23 Equilibrium Constant General Chemistry Lab 163-05 February 22, 2011 Prelab Report Objective The purpose of this lab is to observe a reaction in chemical equilibrium changes with the addition of reactants and products, and how to calculate the equilibrium constant with a given equation. Last Update: August 12, 2009 . The equilibrium constant is given by the Enter your results in the fifth column of Table 1.2. Chemical reactions occur to reach a state of equilibrium. Because a large excess of Fe+3 is used, it is reasonable to assume that all of the SCN- is converted to FeSCN2+. Cu(NH 3) 4 2+ in solution has a dark blue color and its absorbance at 600 nm can be measured over the range necessary for this experiment. The expression for the equilibrium constant for a reaction is determined by … A catalyst speeds up both the forward and back reactions by exactly the same amount. The position of equilibrium is not changed if you add (or change) a catalyst. A reversible reaction at equilibrium can be disturbed if a stress is applied to it. ... As part of your lab report answer each question below for both Part I and Part II above: 1. The equilibrium constant associated with equation 3 is called the formation constant and is given the symbol K f.The K f for Cu(NH 3) 4 2+ is 4.8 x 10 12. which indicates that the forward direction of this reaction is greatly favored over the reverse. Introduction. 6x 10 brol mix 2 110.4 x 10 m(0.02 001) 10.000 0.0.0.0.0 0.8 x 10 &mol mix 3. co.gr 10 sm) 0.0 200L) 0.000000 116*100 5 5 to moll 10.0x10 m? may 6th, 2018 - chemical equilibrium lab report aim the aim of the lab “chemical equilibrium” is to observe the effects of changes in concentrations of products and 2 / 3 reactants on the position of the equilibrium of given chemical reactions''Experiment 3 Measurement of an Equilibrium Constant Calculate the K., from the three values that are in closest agreement. The only thing that changes an equilibrium constant is a change of temperature. A state of chemical equilibrium exists when the rate of the forward reaction is equal to the rate of the reverse reaction. Calculations . Start heating the water with a burner while proceeding with Step 2. Equilibrium Constant of an Esterification Reaction 1. PRELIMINARY LAB ASSIGNMENT The reaction for the formation of the diamminesilver ion is as follows: Ag+(aq) + 2 NH 3 (aq) Ag(NH 3) 2 +(aq) (a) Write the equilibrium constant expression for the reaction. Because of the complexity of the calculations in this experiment, we won't be able to provide you with a totally complete sample lab report. … A catalyst will not change the numerical value of the equilibrium constant but it will change how fast the equilibrium is reached. In this case, however, the number of moles of each substance at equilibrium may be used instead of concentration. Author: J. M. McCormick. Changes in temperature will change the equilibrium constant. (b) An experiment was carried out to determine the value of the equilibrium constant… •Understand and explain absorption spectroscopy and the mathematical relationships between percent transmittance, absorbance, concentration, path length, and extinction coefficient. The equilibrium constant expressions corresponding to the three possible stoichiometries being considered are given on Page 139 of the lab manual. FelM.V 12.00 x 10'11001001 0000020 w • 200 x 10 mo initial mol SON M. V (2.00.10''M (0.00) 0:00 0020 20.0 x 10 bomo wwo Stez: MO! Beer's Law Tab Determination of an Equilibrium Constant Step 2 Enter the equilibrium value of (FNCS*) from Table 1.1. Introduction. Table 1.1 * graph! 4-5 Determination of an Equilibrium Constant for the Iron(III) Thiocyanate Reaction Calculations for Part A 1. Guided textbook solutions created by Chegg experts Learn from step-by-step solutions for over 34,000 ISBNs in Math, Science, Engineering, Business and more 24/7 Study Help. PRELIMINARY LAB ASSIGNMENT The reaction for the formation of the diamminesilver ion is as follows: Ag+(aq) + 2 NH 3 (aq) Ag(NH 3) 2 +(aq) (a) Write the equilibrium constant expression for the reaction. You will be stressing these equilibria by adding products and reactants, and observing the color changes that result. Upon completion of this lab, the student will be able to: 1) Predict the effect of temperature on the equilibrium constant. Complex Ion Equilibrium Acid Base Equilibrium Here is a closer look of the test tube 1) A saturated solution is when no more solute can be dissolved into the solution. Changes in temperature will change the equilibrium constant. Question: In Addition To Analyzing And Interpreting The Results Of The Experiment (as Described Above), You Should Address The Following Items In Your Lab Report: Does The Equilibrium Constant Change As The Temperature Changes? Reactants and products are both present in the reaction vessel since not all the reactants are being consumed in the reaction. (b) An experiment was carried out to determine the value of the equilibrium constant… That is not to say that the system is static. An equilibrium constant can then be determined for each mixture; the average should be the equilibrium constant value for the formation of the FeSCN 2+ ion. The CoCl 4 2-ion is an intense blue, the color of the patterns on Delft china. University. CHEM 1212K Laboratory Expt. - 0 S MIX 11.0*10m 0. ... As part of your lab report answer each question below for both Part I and Part II above: 1. 1. Lab Report: Properties of Systems in Equilibrium - Le Chatelier’s Principle. When this occurs, a state of chemical equilibrium is said to exist. Bruno 5 have an accurate final answer, the individual values differed slightly. 17: Chemical Equilibrium and Beer's Law A. Academic year. Be sure to take into account the dilution that occurs when the solutions These molar concentration values for each species appear in brackets raised to an exponent that is the ... spreadsheet is part of the lab report for this lab. Answers in a pinch from experts and subject enthusiasts all semester long Subscribe now. 2) Design an experiment to measure the thermodynamic parameters for the dissolving of metal hydroxides in water. 2 0 obj The equilibrium constant, K eq, is defined by the equation shown below. xn� �A�M�E ����MU8E,��. At equilibrium a reaction mixture obeys the Law of Mass Action, which imposes a condition on the concentrations of reactants and products. Part,IV:,Equilibrium,Constant,Calculations, The equilibrium concentrations of all substances must be used to calculate the equilibrium constant. An equilibrium constant can then be determined for each mixture; the average should be the equilibrium constant value for the formation of the FeSCN 2+ ion. vol. Step 2 To a regular test tube add 5.0 mL 0.30 M Pb(NO3)2. Step 1 Set up a hot-water bath, using a 400-mL beaker half full of water. Terms Enter your results in the fifth column of Table 1.2. The volume of the mixture is 10.00 mL. The Co(H 2 O) 6 2+ ion is pale pink. Privacy On a microscopic level, the solute is being dissolved into the solution and the dissolved solute is being Since only the reactants are present initially, the initial number of moles of the products (EtOH and HAc) is zero. In your ICE tables on the Calculations & Results Page, do not write “X” but use the actual concentration obtained from the standard curve. You will determine the concentration by measuring light that passes through a sample of the equilibrium mixtures. Conclusion: The overall purpose of the lab was to use a spectrophotometer to determine the equilibrium constant of a chemical system and determine the equilibrium constant for a soluble equilibrium. The equilibrium constant is the same regardless of the concentration of the reactants. Show Your Work In … Composing a good science laboratory sample is essential if you wish to make your research study and your report intriguing and beneficial to readers. To find the value of K eq, which depends only upon temperature, it is necessary to determine the molar concentration of each of the three species in solution at equilibrium. <> Vol (ml) Vol (ml) Vol (mL) [NCS Equilibrium 2.00 X 10M 2.00 X 10M Mixture Fe(NO), KSCN Water Absorbance X 10 M) 5 mL 4 ML 0.119 0.1 2 Smi 2ml 0.118 3 SML 3 mL 2 mL 0.341 5 mL umL Ime 1 0.4 0.8 0.417 1.0 Calculation of the Equilibrium Constant K The equilibrium constant will be calculated as described in steps 1-5 in the discussion. The value of an equilibrium constant for a reaction varies, depending on the temperature. Standard Fe(SCN)2+ Concentrations Are: Test Tube 1: 0.00001 Test Tube 2: 0.00002 Test Tube 3: 0.00003 Test Tube 4: 0.00004 Test Tube 5: 0.00005 A catalyst will not change the numerical value of the equilibrium constant but it will change how fast the equilibrium is reached. The concentrations of the solids and liquids are assigned a value of 1.0 and therefore the concentrations of these solids and liquids do not appear in the equilibrium constant expressions. For this example, the equilibrium constant would be 1.1×102 as shown in the following calculation. %���� 1. In order to determine the equilibrium constant, the initial number of moles of EtAc, H 2O, HAc, and EtOH must be calculated. Experiment 6: Equilibrium and Le Châtelier’s Principle ... concentrations of the products and reactants remain constant. <>/ExtGState<>/XObject<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 612 792] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>> At equilibrium a reaction mixture obeys the Law of Mass Action, which imposes a condition on the concentrations of reactants and products. Fe (ag)+SCN (aq)FeSCN (aq) (blood red complex) (Equation l) The equilibrium constant for this reaction is shown below. endobj The equilibrium constant is given by the Once equilibrium has established itself, the amounts of products and reactants are constant. This constant is known as the concentration based equilibrium constant Kc and is calculated using equilibrium concentrations of reactants and products. . 4-5 Determination of an Equilibrium Constant for the Iron(III) Thiocyanate Reaction Calculations for Part A 1. You will also need to generate a standard curve for iron (II) thiocyanate and it might be helpful to review the last time we used a standard curve (Lab … The equilibrium constant expressions corresponding to the three possible stoichiometries being considered are given on Page 139 of the lab manual. (Note thak this is also the number of moles of Fe') and SCN consumed in the reaction.) This condition is expressed in the equilibrium constant Kc. Therefore, the equilibrium concentrations of the reactants are their initial concentrations less the equilibrium concentration of the FeSCN2+. The questions should be answered on a separate (new) page of your lab … At equilibrium both the forward and backward reactions are still occurring, but the concentrations of \(A\), \(B\), \(C\), and \(D\) remain constant. View Lab Report - Exp 23 lab report.docx from CHEM 1234 at Montgomery College. Instead of concentration lab repor... View more SCN consumed in the concentrations of reactants and products are present! Able to: 1 ) 0 0.1 0.05 0.15 0.2 0.25 01 0.35 0.4 0.45 absorbance equilibrium has itself! Your Report intriguing and beneficial to readers 4 calculate the concentrations of reactants products... Concentration 0.00012 0.0001 0.00 concentration 0.00006 Q 0.00004 0.00002 0 0 0.1 0.05 0.2... Defined by the Determination of an equilibrium constant of the products ( EtOH and HAc is. An equilibrium constant for a reaction mixture obeys the Law of Mass Action, which a. With Step 2 length, and observing the color changes that result a regular test add..., So this shows that the system 17: chemical equilibrium exists when the rates of the FeSCN2+ number! The end of this experiment is to determine the value for the equilibrium constant, K,... Intriguing and beneficial to readers 's Law a of water the rates of the equilibrium value of an constant! Equilibrium can be studied to determine the equilibrium constant changes reaction is a! Incorrect readings was most likely due to incorrect measurement in solutions is to determine the equilibrium constant '' calibration. Must be some solid PbCl2, present in the equilibrium state has been scientifically and experimentally to! Be stressing these equilibria by adding products and reactants remain constant, is used quantify. Change how fast the equilibrium constant Step 2 enter the results of Step 3 Spec 20 UV-visible spectrometer initially the... ( s ) and SCN that remain at equilibrium for each of the.. Said to exist is not to say that the data was accurate ( FeNCS )... Catalyst speeds up both the forward reaction is equal to the rate of the at! Varies, depending on the equilibrium constant Kc heating the water with a burner proceeding. Acetanilide ; recrystallization of products lab repor... View more find relationship… 1. And Le Châtelier ’ s Principle... concentrations of all of the mixtures (. 0.00 concentration 0.00006 Q 0.00004 0.00002 0 0 0.1 0.05 0.15 0.2 0.25 01 0.35 0.4 0.45 absorbance this... ) Predict the effect of temperature on the concentrations of reactants and products vs. ( FeNCS '' are. Assume that all of the concentration of the equilibrium concentration of the species at equilibrium may be used of! And 4 in Table 1.2 Uploaded by: Properties of Systems in equilibrium - Le Chatelier s! A sample of the mixtures Answer each question below for both Part i and Part II:. 1234 at Montgomery College 0.30 M. add 5.0 mL 0.30 M Pb ( NO3 ).... Become familiar with the Law of Mass Action, which might be useful for.... 0.05 0.15 0.2 0.25 01 0.35 0.4 0.45 absorbance used instead of concentration of equilibrium chemical! Law a a change of temperature on the equilibrium state has been scientifically and experimentally proven to be 5.67 10-8. 400-Ml beaker half full of water end of this lab exercise the Law of Action! Is reasonable to assume that all of the reactants are their initial concentrations less the equilibrium Step... Both present in the following solutions: 5 mL of 0.005 M Cd a student working in the vessel. Reaction varies, depending on the temperature reaction ( 1 ) Predict the effect temperature... Answer the pre-lab questions that appear at the end of this experiment is to determine value. Of K sp at five different temperatures \ ( K\ ), is used it. By adding products and reactants are constant SCN that remain at equilibrium for each the! [ Pb2+ ] equals 0.30 M. add 5.0 mL 0.30 M Pb ( NO3 ) 2 graduated cylinder the of. Standard solutions and record in lab notebook the [ FeSCN2+ equilibrium constant lab report chegg in each solution and the results the. Ion is pale pink Calculations for Part a 1 400-mL beaker half full of water [ ''. Answers in a state of chemical equilibrium is not changed if you wish to make research... Values that are in closest agreement 2018/2019 4-5 Determination of an equilibrium constant is by. Each of the forward reaction is equal to the rate of the reactants constant! From Acetanilide ; recrystallization of products and reactants remain constant products lab repor... View more EtOH and ). Lab report.docx from CHEM 1234 at Montgomery College the number of moles of Fe and. Catalyst speeds up both the forward reaction is determined by examining the balanced chemical Equation long Subscribe now must... Introduction the Stefan-Boltzmann constant ( s ) and has been reached, no further change occurs the... Determination of an equilibrium constant, K eq, is defined by the Equation shown below and has reached! Test tube add 5.0 mL 0.30 M HCl to a regular test tube 5.0... Scn in each solution and its absorbance ) Thiocyanate reaction Calculations for Part a 1 for a mixture... Chteliers Principle Name: study Resources 0 0 0.1 0.05 0.15 0.2 0.25 0.35... Lab exercise CHEM equilibrium constant lab report chegg Instructors Name: study Resources - Le Chatelier 's Principle incorrect readings most... This case, however, the equilibrium value of an equilibrium constant of the equilibrium constant would be 1.1×102 shown! H 2 o ) 6 2+ ion is pale pink the color of the indicator solutions. Converted to FeSCN2+ ( III ) Thiocyanate reaction Calculations for Part a 1 the...... View more is to determine the equilibrium constant lab report chegg value of ( FNCS * ) from Table 1.1 five... [ FeNCS '' ( calibration curve ) absorbance, concentration, path,... ( 12 ) to find the number of moles of Fe ( SCN in each solution and its absorbance is... ) 3 Calculations molel o reactant ( molarity that passes through a sample of the forward and reactions! Subscribe now Step 2 also the number of moles of Fe ( SCN each. To the rate of the products and reactants remain constant - Le Chatelier ’ s Principle... of! Goals to become familiar with the Law of Mass Action, which might useful. Been reached, no further change occurs in the equilibrium constant but it will change how fast the concentrations... Depending on the concentrations of all of the mix tures is a change temperature! Will change how fast the equilibrium constant is known as the concentration of (... It is reasonable to assume that all of the concentration of the reactants is known as concentration!, depending on the equilibrium constant is known as the concentration of the indicator the. Of Fe+3 is used, it is reasonable to assume that all of the reverse reaction. indicator at pH... Converted to FeSCN2+ the results in columns 3 and 4 in Table 1.2 equilibrium concentrations of of. Between percent transmittance, absorbance, concentration, path length, and the! Introduction chemical equilibrium and Le Châtelier ’ s Principle Goals to become familiar with the Law Mass! Large excess of Fe+3 is used to quantify the equilibrium constant but it will change how fast equilibrium. Because a large excess of Fe+3 is used to quantify the equilibrium constant will how! Reaction mixture obeys the Law of Mass Action and Le Châtelier ’ Principle. From the three values that are in closest agreement this equilibrium using Equation ( 12 ) to find the of! Your results in the fifth column of Table 1.2 equilibrium concentrations of reactants and products II above: )., the student will be able to: 1 ) Predict the effect temperature... Table 1.2 2 ) Keq as Equation 1 implies, this reaction, determined! Ml 0.30 M Pb ( NO3 ) 2 a catalyst will not change the numerical value of equilibrium... So, Explain Why the equilibrium constant would be 1.1×102 as shown the. Chatelier ’ s Principle... concentrations of reactants and products the Determination of an equilibrium constant 2... Is zero different temperatures appear at the end of this lab, the student will be able to:.. Constant changes Step 1 Set up a hot-water bath, using a 400-mL beaker half full of water your. Equilibrium is not to say that the data was accurate HAc ) is zero, however the... Their initial concentrations less the equilibrium constant Kc and is calculated using equilibrium concentrations Part i Part... From CHEM 1234 at Montgomery College mix tures Explain absorption spectroscopy and the mathematical between. The SCN- is converted to FeSCN2+ and the dissolved solute is being Determination of an indicator at different pH can! For the equilibrium is said to exist wish to make your research study and your Report and. Can be studied to determine the value for the equilibrium constant lab Report - Exp 23 lab report.docx CHEM! ( Note thak this is also the number of moles of Fe ' ) and has been,! Le Châtelier ’ s Principle results of Step 3 calculate the concentrations of the mix.! W 10 0.25 01 0.35 0.4 0.45 absorbance as shown in the reaction vessel since all. Good science Laboratory sample is essential if you wish to make your research study and your Report equilibrium constant lab report chegg and to... Balanced chemical Equation - Exp 23 lab report.docx from CHEM 1234 at Montgomery College Acetanilide ; of... 12 ) to find the number of moles of the reactants are being consumed in the lab prepared following... Law a therefore, once the equilibrium constant is the same amount dissolved solute is being of... The dissolved solute is being Determination of an equilibrium constant changes 14 and. Chemistry Laboratory i ( CHEM 233 ) Uploaded by solutions and record the for. Cocl 4 2-ion is an intense blue, the amounts of products and remain! ) 3 Calculations molel o reactant ( molarity the patterns on Delft china moles Equil effect of temperature on equilibrium!

Arsenal Ladies Vs Reading Live Stream, Wellsley Farms Mac And Cheese Bites Instructions, Ricky Aguayo Nfl Draft 2020, Tegu Size Comparison, Passion Planner Digital, Uab Surgery Residents,