Question 1: When creating the calibration curve during week 1, it was determined that [KSCN] =...
Question 1: When creating the calibration curve during week 1,
it was determined that [KSCN] = [FeSCN2+] at equilibrium. Explain
why these two concentrations were equal in terms of the relative
concentrations of each reactant, the limiting reactant, and the
direction in which the reaction proceeded.
Question 2: Describe the process by which equilibrium
concentrations of the reactants and product were determined.
Include in your discussion, how the equilibrium (final)
concentration of FeSCN2+ was determined using a calibration
curve, mole-to-mole ratios and how an ICE table should be
completed. Explain which values were subtracted and added, and
why.
These questions were assigned to us for a Chemistry 2 lab involving the use of KSCN and FeSCN2+, and any help or assistance in answering these two questions would be greatly appreciated. Thank you!
Homework Answers
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Question 1: When creating the calibration curve during week 1,
it was determined that [KSCN] =...
Question 1: When creating the calibration curve during week 1, it was determined that [KSCN] = [...
Question 1: When creating the calibration curve during week 1, it was determined that [KSCN] = [FeSCN2+] at equilibrium. Explain why these two concentrations were equal in terms of the relative concentrations of each reactant, the limiting reactant, and the direction in which the reaction proceeded Question 2: Describe the process by which equilibrium concentrations of the reactants and product were determined. Include in your discussion, how the equilibrium (final) concentration of FeSCN2+ was determined using a calibration curve, mole-to-mole...
1. You prepare a mixture to use to create a colorimetry calibration curve for FeSCN2+ by...
1. You prepare a mixture to use to create a colorimetry calibration curve for FeSCN2+ by mixing these things in a 25.00 mL volumetric flask and then diluting to the volume of the flask with 0.3 M HNO3. 5.00 mL 0.00200 M NaSCN 10.00 mL 0.30 M Fe(NO3)3 What is the concentration of FeSCN2+ in this mixture? [Pay attention to the values to determine which reactant is being driven to completely react...] 2. You prepare a mixture to use to...
the guiding questions. the max absorbance is 460. Guiding questions complex turque . Compare the molar...
the
guiding questions. the max absorbance is 460.
Guiding questions complex turque . Compare the molar absorptivity coefficients you obtained with SCN and Fe" as limiting reagents. Would you expect them to be the same? Why or why not? (Week 1) • The accepted molar absorptivity coefficient for FeSCN is 7.0x10' M'cm''. Find the bias and relative bias of your values and suggest possible sources of errors. (Week 1) • Which molar absorptivity coefficient will you use to calculate the...
1. Explain the purpose of the calibration curve, and why it is necessary to have a calibration curve for each diffe...
1. Explain the purpose of the calibration curve, and why it is necessary to have a calibration curve for each different instrument used. 2. Explain why there may have been some variation in your calculated values of K. 3. Explain why you started with different concentrations of reactants and products and ended up with similar values of K. Was this expected? 4. Calculate the value of Q. for each of test tubes A, B, C, and D. How do these...
Tips for Lab Discussion • Discuss calibration curve and slope determined. Discuss concentration of copper found....
Tips for Lab Discussion • Discuss calibration curve and slope determined. Discuss concentration of copper found. Discuss percent of copper in brass sample calculated. Discuss sources of success or error encountered during the experiment Practice Problems 1- Why is a calibration curve constructed? 2- If you used a dirty cuvette when reading when the calibration curve, would this raise or lower the value of the slope? Explain. 3- If unknown to the student, the standard CuSO4.5H2O solution was prepared using...
please help answer questions for mixture 1 AND mixture 2 thank you! Table 23.1 Test Tube...
please help answer questions for mixture 1 AND mixture 2 thank
you!
Table 23.1 Test Tube Number 1 2 3 4 5 5,00 1.00 5.00 2.00 Volume Fe(NO), solution (ml.) Volume KSCN solution (ml.) Volume H,O (ml.) 5.00 3.00 2.00 5.00 4.00 5.00 5.00 0.00 4.00 3.00 1.00 Mixture 2 3 4 5 Absorbance 0.079 0.165 0.246 0.311 0.400 In order to convert the absorbance values provided below into equilibrium concentrations of FeSCN?, you will need to know the slope...
I. Write the equilibrium constant expression, K for the following reaction Fe"(ag) FENCS(ag) SCN (ag) + CFENCS D 2....
I. Write the equilibrium constant expression, K for the following reaction Fe"(ag) FENCS(ag) SCN (ag) + CFENCS D 2. In part A of Experiment 34, it was assumed that all of the SCN added to the reaction mixture was converted to product (FeNCS). Which of the following best explains why that assumption was valid? A) The moles of Fe added equaled the moles of SCN- added. B) In part A, the SCN was the limiting reactant whereas in part B,...
are theses correct? please correct me if they are not. Results Fe Test Tube 2: FeSCN...
are
theses correct?
please correct me if they are not.
Results Fe Test Tube 2: FeSCN (aa) SCN () Fe Chemical equation: Explanation: The equilibrium shifted toward the increased the due to the addition of Fe(NO,)) because it of the Test Tube 3: FESCN 0) SCN () (as Chemical equation: Fe(ag) Explanation: Test Tube 4: Chemical equation: Fe(agk FeSCN( (aq)h Explanation: Test Tube 5: Chemical equation: Fe"( SCN () FESCN 3+ + (sq) Explanation: Test Tube 6 Chemical equation: Fe(a...
1) At 298 K, an equilibrium mixture contains P H2=0.958 atm, P I2= 0.877 atm and...
1) At 298 K, an equilibrium
mixture contains P H2=0.958 atm, P I2= 0.877 atm and P HI=0.020
atm. Please try and answer all!
You must show all your work to receive credit. Watch sig figs! Consider the reaction: 1) At 298 K, an equilibrium mixture contains P H2-0.958 atm, P ½=0.877 atm, and P HI-0.020 atm. Calculate the value of the equilibrium constant Kp? a) (o, o2) 0.938x o.87? b) And what is the value of the equilibrium constant...
1. State your research topic. This is the broad umbrella under which your research question will...
1. State your research topic. This is the broad umbrella under which your research question will fall. For example: Cancer care at end of life 2. Literature review. Provide a brief review of the literature (2-3 paragraphs) that leads the reader to your research question. Cite a few articles that introduce your topic. Then narrow your focus. For example, “Smith (2018), Jones (2017) and others have examined the frequency of chemotherapy use in the last 4 weeks of life, but...
the
guiding questions. the max absorbance is 460.
Guiding questions complex turque . Compare the molar absorptivity coefficients you obtained with SCN and Fe" as limiting reagents. Would you expect them to be the same? Why or why not? (Week 1) • The accepted molar absorptivity coefficient for FeSCN is 7.0x10' M'cm''. Find the bias and relative bias of your values and suggest possible sources of errors. (Week 1) • Which molar absorptivity coefficient will you use to calculate the...
1. Explain the purpose of the calibration curve, and why it is necessary to have a calibration curve for each different instrument used. 2. Explain why there may have been some variation in your calculated values of K. 3. Explain why you started with different concentrations of reactants and products and ended up with similar values of K. Was this expected? 4. Calculate the value of Q. for each of test tubes A, B, C, and D. How do these...
Tips for Lab Discussion • Discuss calibration curve and slope determined. Discuss concentration of copper found. Discuss percent of copper in brass sample calculated. Discuss sources of success or error encountered during the experiment Practice Problems 1- Why is a calibration curve constructed? 2- If you used a dirty cuvette when reading when the calibration curve, would this raise or lower the value of the slope? Explain. 3- If unknown to the student, the standard CuSO4.5H2O solution was prepared using...
please help answer questions for mixture 1 AND mixture 2 thank
you!
Table 23.1 Test Tube Number 1 2 3 4 5 5,00 1.00 5.00 2.00 Volume Fe(NO), solution (ml.) Volume KSCN solution (ml.) Volume H,O (ml.) 5.00 3.00 2.00 5.00 4.00 5.00 5.00 0.00 4.00 3.00 1.00 Mixture 2 3 4 5 Absorbance 0.079 0.165 0.246 0.311 0.400 In order to convert the absorbance values provided below into equilibrium concentrations of FeSCN?, you will need to know the slope...
I. Write the equilibrium constant expression, K for the following reaction Fe"(ag) FENCS(ag) SCN (ag) + CFENCS D 2. In part A of Experiment 34, it was assumed that all of the SCN added to the reaction mixture was converted to product (FeNCS). Which of the following best explains why that assumption was valid? A) The moles of Fe added equaled the moles of SCN- added. B) In part A, the SCN was the limiting reactant whereas in part B,...
are
theses correct?
please correct me if they are not.
Results Fe Test Tube 2: FeSCN (aa) SCN () Fe Chemical equation: Explanation: The equilibrium shifted toward the increased the due to the addition of Fe(NO,)) because it of the Test Tube 3: FESCN 0) SCN () (as Chemical equation: Fe(ag) Explanation: Test Tube 4: Chemical equation: Fe(agk FeSCN( (aq)h Explanation: Test Tube 5: Chemical equation: Fe"( SCN () FESCN 3+ + (sq) Explanation: Test Tube 6 Chemical equation: Fe(a...
1) At 298 K, an equilibrium
mixture contains P H2=0.958 atm, P I2= 0.877 atm and P HI=0.020
atm. Please try and answer all!
You must show all your work to receive credit. Watch sig figs! Consider the reaction: 1) At 298 K, an equilibrium mixture contains P H2-0.958 atm, P ½=0.877 atm, and P HI-0.020 atm. Calculate the value of the equilibrium constant Kp? a) (o, o2) 0.938x o.87? b) And what is the value of the equilibrium constant...
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