2. (a) A voltaic cell is constructed as follows: Zn |Zn²+| H|H₂ The half-cell reactions are: Zn --→ Zn²+ + ze- E² = 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 pHz = 1.0 atm and [Zn²+ ] = 0.1 M and the Ecl=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 CuSO, 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- E² = 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 pHz = 1.0 atm and [Zn²+ ] = 0.1 M and the Ecl=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 CuSO, solution? Cu²+ze --→ Cu(s)
Chemistry
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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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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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![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%2Fce39fda0-a103-4cf3-8aa5-850537171ab5%2F8o72qkr_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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