2. (a) A voltaic cell is constructed as follows: Zn | Zn²+ | H*|H₂ The half-cell reactions are: Zn → Zn²+ze E = 0.76 V If the voltage of the cell is 0.45V at 25°C when [Zn²+] = 1.0 M and PH₂ = 1.0 atm, what is [H+]? 2H+ + 2e- → H₂ E = 0.0V (b) For the voltaic cell described in part (a), find the pH of the cathodic solution when pH2 = 1.0 atm and [Zn²+] = 0.1 M and the E*cell = 0.542 V. (c) What amount of time is needed to plate 2.08 g of copper at a constant current flow of 1.26 A from a 0.1 M CuSO4 solution? Cu²+ze--> Cu(s)
2. (a) A voltaic cell is constructed as follows: Zn | Zn²+ | H*|H₂ The half-cell reactions are: Zn → Zn²+ze E = 0.76 V If the voltage of the cell is 0.45V at 25°C when [Zn²+] = 1.0 M and PH₂ = 1.0 atm, what is [H+]? 2H+ + 2e- → H₂ E = 0.0V (b) For the voltaic cell described in part (a), find the pH of the cathodic solution when pH2 = 1.0 atm and [Zn²+] = 0.1 M and the E*cell = 0.542 V. (c) What amount of time is needed to plate 2.08 g of copper at a constant current flow of 1.26 A from a 0.1 M CuSO4 solution? Cu²+ze--> Cu(s)
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Question
![2. (a) A voltaic cell is constructed as follows: Zn | Zn²+ | H*|H₂
The half-cell reactions are:
Zn → Zn²+ze E = 0.76 V
If the voltage of the cell is 0.45V at 25°C when [Zn²+] = 1.0 M and PH₂ = 1.0 atm, what is [H+]?
2H+ + 2e- → H₂
E = 0.0V
(b) For the voltaic cell described in part (a), find the pH of the cathodic solution when pH2 =
1.0 atm and [Zn²+] = 0.1 M and the E*cell = 0.542 V.
(c) What amount of time is needed to plate 2.08 g of copper at a constant current flow
of 1.26 A from a 0.1 M CuSO4 solution? Cu²+ze--> Cu(s)](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F471fe867-4cd4-421a-b761-c6df5bf7e996%2F8f68040e-49d2-4880-9b4c-f194fe6509f5%2Fhhmrwwb_processed.png&w=3840&q=75)
Transcribed Image Text:2. (a) A voltaic cell is constructed as follows: Zn | Zn²+ | H*|H₂
The half-cell reactions are:
Zn → Zn²+ze E = 0.76 V
If the voltage of the cell is 0.45V at 25°C when [Zn²+] = 1.0 M and PH₂ = 1.0 atm, what is [H+]?
2H+ + 2e- → H₂
E = 0.0V
(b) For the voltaic cell described in part (a), find the pH of the cathodic solution when pH2 =
1.0 atm and [Zn²+] = 0.1 M and the E*cell = 0.542 V.
(c) What amount of time is needed to plate 2.08 g of copper at a constant current flow
of 1.26 A from a 0.1 M CuSO4 solution? Cu²+ze--> Cu(s)
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