QUESTION 1 In Questions 1 through 6, you will be calculating the initial concentrations of Fe³+ ([Fe³+]0) and SCN ([SCN ]o) for each of the reactions you will perform. You should transfer the answers to these questions to the appropriate ICE table(s) on the "Data and Calculations" sheet. In all five reactions, you will be using 5.0 mL of 0.0020 M Fe(NO3)3. Each reaction mixture will be diluted to a final volume of 10.0 mL. What is [Fe³+]o in all five of the reactions you will study? Type your answer, WITHOUT UNITS, in the box below. Include 2 significant figures. If you want to enter your answers in scientific notation, use the format that Blackboard recognizes: 1.5 x 10-3 would be entered as 1.5E-3 (no spaces). QUESTION 2 In Test Tube 1, you will be using 1.0 mL of 0.0020 M KSCN. Each reaction mixture will be diluted to a final volume of 10.0 mL. What is [SCN 10 in Test Tube 1? Type your answer, WITHOUT UNITS, in the box below. Include 2 significant figures. QUESTION 3 In Test Tube 2, you will be using 2.0 mL of 0.0020 M KSCN. Each reaction mixture will be diluted to a final volume of 10.0 mL. What is [SCN 10 in Test Tube 2? Type your answer, WITHOUT UNITS, in the box below. Include 2 significant figures.
QUESTION 1 In Questions 1 through 6, you will be calculating the initial concentrations of Fe³+ ([Fe³+]0) and SCN ([SCN ]o) for each of the reactions you will perform. You should transfer the answers to these questions to the appropriate ICE table(s) on the "Data and Calculations" sheet. In all five reactions, you will be using 5.0 mL of 0.0020 M Fe(NO3)3. Each reaction mixture will be diluted to a final volume of 10.0 mL. What is [Fe³+]o in all five of the reactions you will study? Type your answer, WITHOUT UNITS, in the box below. Include 2 significant figures. If you want to enter your answers in scientific notation, use the format that Blackboard recognizes: 1.5 x 10-3 would be entered as 1.5E-3 (no spaces). QUESTION 2 In Test Tube 1, you will be using 1.0 mL of 0.0020 M KSCN. Each reaction mixture will be diluted to a final volume of 10.0 mL. What is [SCN 10 in Test Tube 1? Type your answer, WITHOUT UNITS, in the box below. Include 2 significant figures. QUESTION 3 In Test Tube 2, you will be using 2.0 mL of 0.0020 M KSCN. Each reaction mixture will be diluted to a final volume of 10.0 mL. What is [SCN 10 in Test Tube 2? Type your answer, WITHOUT UNITS, in the box below. Include 2 significant figures.
Chemistry & Chemical Reactivity
10th Edition
ISBN:9781337399074
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter17: Principles Of Chemical Reactivity: Other Aspects Of Aqueous Equilibria
Section: Chapter Questions
Problem 97GQ: A solution contains Ca2+ and Pb2+ ions, both at a concentration of 0.010 M. You wish to separate the...
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Question
![QUESTION 1
In Questions 1 through 6, you will be calculating the initial concentrations of Fe³+ ([Fe³+]0) and SCN ([SCN ]o) for each of
the reactions you will perform. You should transfer the answers to these questions to the appropriate ICE table(s) on the
"Data and Calculations" sheet.
In all five reactions, you will be using 5.0 mL of 0.0020 M Fe(NO3)3. Each reaction mixture will be diluted to a final volume of 10.0 mL.
What is [Fe³+]o in all five of the reactions you will study? Type your answer, WITHOUT UNITS, in the box below. Include 2 significant
figures.
If you want to enter your answers in scientific notation, use the format that Blackboard recognizes: 1.5 x 10-3 would be entered as
1.5E-3 (no spaces).
QUESTION 2
In Test Tube 1, you will be using 1.0 mL of 0.0020 M KSCN. Each reaction mixture will be diluted to a final volume of 10.0 mL. What is
[SCN ]o in Test Tube 1? Type your answer, WITHOUT UNITS, in the box below. Include 2 significant figures.
QUESTION 3
In Test Tube 2, you will be using 2.0 mL of 0.0020 M KSCN. Each reaction mixture will be diluted to a final volume of 10.0 mL. What is
[SCN ]o in Test Tube 2? Type your answer, WITHOUT UNITS, in the box below. Include 2 significant figures.
QUESTION 4
In Test Tube 3, you will be using 3.0 mL of 0.0020 M KSCN. Each reaction mixture will be diluted to a final volume of 10.0 mL. What is
[SCN ]o in Test Tube 3? Type your answer, WITHOUT UNITS, in the box below. Include 2 significant figures.
QUESTION 5
In Test Tube 4, you will be using 4.0 mL of 0.0020 M KSCN. Each reaction mixture will be diluted to a final volume of 10.0 mL. What is
[SCN ]o in Test Tube 4? Type your answer, WITHOUT UNITS, in the box below. Include 2 significant figures.
QUESTION 6
In Test Tube 5, you will be using 5.0 mL of 0.0020 M KSCN. Each reaction mixture will be diluted to a final volume of 10.0 mL. What is
[SCN ]o in Test Tube 5? Type your answer, WITHOUT UNITS, in the box below. Include 2 significant figures.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F4a31084d-53de-40ac-8333-22b405fb7df5%2F7d67039f-baee-464a-ae5b-8b053b2a075f%2Fat5yeu_processed.png&w=3840&q=75)
Transcribed Image Text:QUESTION 1
In Questions 1 through 6, you will be calculating the initial concentrations of Fe³+ ([Fe³+]0) and SCN ([SCN ]o) for each of
the reactions you will perform. You should transfer the answers to these questions to the appropriate ICE table(s) on the
"Data and Calculations" sheet.
In all five reactions, you will be using 5.0 mL of 0.0020 M Fe(NO3)3. Each reaction mixture will be diluted to a final volume of 10.0 mL.
What is [Fe³+]o in all five of the reactions you will study? Type your answer, WITHOUT UNITS, in the box below. Include 2 significant
figures.
If you want to enter your answers in scientific notation, use the format that Blackboard recognizes: 1.5 x 10-3 would be entered as
1.5E-3 (no spaces).
QUESTION 2
In Test Tube 1, you will be using 1.0 mL of 0.0020 M KSCN. Each reaction mixture will be diluted to a final volume of 10.0 mL. What is
[SCN ]o in Test Tube 1? Type your answer, WITHOUT UNITS, in the box below. Include 2 significant figures.
QUESTION 3
In Test Tube 2, you will be using 2.0 mL of 0.0020 M KSCN. Each reaction mixture will be diluted to a final volume of 10.0 mL. What is
[SCN ]o in Test Tube 2? Type your answer, WITHOUT UNITS, in the box below. Include 2 significant figures.
QUESTION 4
In Test Tube 3, you will be using 3.0 mL of 0.0020 M KSCN. Each reaction mixture will be diluted to a final volume of 10.0 mL. What is
[SCN ]o in Test Tube 3? Type your answer, WITHOUT UNITS, in the box below. Include 2 significant figures.
QUESTION 5
In Test Tube 4, you will be using 4.0 mL of 0.0020 M KSCN. Each reaction mixture will be diluted to a final volume of 10.0 mL. What is
[SCN ]o in Test Tube 4? Type your answer, WITHOUT UNITS, in the box below. Include 2 significant figures.
QUESTION 6
In Test Tube 5, you will be using 5.0 mL of 0.0020 M KSCN. Each reaction mixture will be diluted to a final volume of 10.0 mL. What is
[SCN ]o in Test Tube 5? Type your answer, WITHOUT UNITS, in the box below. Include 2 significant figures.
![QUESTION 7
What is the correct expression for Kc for the reaction you will be studying in this experiment. Assume that all concentrations are
measured at equilibrium. The chemical equation for this reaction is:
Fe 3+ (aq) + SCN¯(aq) 2 FeSCN 2+ (aq)
O Kc = ([Fe³+][SCN]) / [FeSCN²+]
Kc = [FeSCN²+] / [[Fe³+][SCN])
Kc = [SCN]/([Fe³+][FeSCN²+])
Kc = [Fe³+][SCN][FeSCN²+]
O None of the above
QUESTION 8
Why will you be measuring the absorbance of each of your reaction mixtures after they have reached equilibrium?
The measured value of the absorbance is identical to the equilibrium concentration of FeSCN²+, [FeSCN²+Jeq
The measured value of the absorbance is directly proportional to the equilibrium concentration of Fe³+, [Fe³+ leq
The measured value of the absorbance is directly proportional to the equilibrium concentration of FeSCN²+, [FeSCN²+ leq
The measured value of the absorbance is inversely proportional to the equilibrium concentration of FeSCN²+, [FeSCN²+Jeq
None of the above
QUESTION 9
True or false?
The initial concentration of FeSCN 2+ in each reaction will be the same as the initial concentration of Fe 3+.
O True
O False
QUESTION 10
You may find it helpful to refer to the ICE table below as you answer Questions 10 through 12.
Consider data for Test Tube 3, which consists of 5.0 mL of 0.0020 M Fe(NO 3) 3 + 3.0 mL of 0.0020 M KSCN + 2.0 mL of H 20 to
give a total volume of 10.0 mL.
Initial
Change
Equilibrium
[Fe³+]
Q1 answer
-X
Q11 answer
[SCN]
Q4 answer
-X
Q12 answer
[FeSCN²+]
+X
x = Q10 answer
Suppose the measured absorbance of this Test Tube 3 reaction mixture, after it is thoroughly stirred, is 0.368. Use Equation (3)
in the "Background and Procedure" handout to calculate [FeSCN 2+] eq
Enter your numerical answer, WITHOUT UNITS, in the box below. Include 3 significant figures.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F4a31084d-53de-40ac-8333-22b405fb7df5%2F7d67039f-baee-464a-ae5b-8b053b2a075f%2Fk65w6u6_processed.png&w=3840&q=75)
Transcribed Image Text:QUESTION 7
What is the correct expression for Kc for the reaction you will be studying in this experiment. Assume that all concentrations are
measured at equilibrium. The chemical equation for this reaction is:
Fe 3+ (aq) + SCN¯(aq) 2 FeSCN 2+ (aq)
O Kc = ([Fe³+][SCN]) / [FeSCN²+]
Kc = [FeSCN²+] / [[Fe³+][SCN])
Kc = [SCN]/([Fe³+][FeSCN²+])
Kc = [Fe³+][SCN][FeSCN²+]
O None of the above
QUESTION 8
Why will you be measuring the absorbance of each of your reaction mixtures after they have reached equilibrium?
The measured value of the absorbance is identical to the equilibrium concentration of FeSCN²+, [FeSCN²+Jeq
The measured value of the absorbance is directly proportional to the equilibrium concentration of Fe³+, [Fe³+ leq
The measured value of the absorbance is directly proportional to the equilibrium concentration of FeSCN²+, [FeSCN²+ leq
The measured value of the absorbance is inversely proportional to the equilibrium concentration of FeSCN²+, [FeSCN²+Jeq
None of the above
QUESTION 9
True or false?
The initial concentration of FeSCN 2+ in each reaction will be the same as the initial concentration of Fe 3+.
O True
O False
QUESTION 10
You may find it helpful to refer to the ICE table below as you answer Questions 10 through 12.
Consider data for Test Tube 3, which consists of 5.0 mL of 0.0020 M Fe(NO 3) 3 + 3.0 mL of 0.0020 M KSCN + 2.0 mL of H 20 to
give a total volume of 10.0 mL.
Initial
Change
Equilibrium
[Fe³+]
Q1 answer
-X
Q11 answer
[SCN]
Q4 answer
-X
Q12 answer
[FeSCN²+]
+X
x = Q10 answer
Suppose the measured absorbance of this Test Tube 3 reaction mixture, after it is thoroughly stirred, is 0.368. Use Equation (3)
in the "Background and Procedure" handout to calculate [FeSCN 2+] eq
Enter your numerical answer, WITHOUT UNITS, in the box below. Include 3 significant figures.
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