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(a) A voltaic cell is constructed as follows: Zn | Zn2+ | H+ | H2   The half-cell reactions are:   Zn ---à Zn2+ + 2e–        E° = 0.76 V                 2H+ + 2e- à H2        E° = 0.0V   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+]?   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.

(a) A voltaic cell is constructed as follows: Zn | Zn2+ | H+ | H2   The half-cell reactions are:   Zn ---à Zn2+ + 2e–        E° = 0.76 V                 2H+ + 2e- à H2        E° = 0.0V   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+]?   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.

Chemistry & Chemical Reactivity
Chemistry & Chemical Reactivity
9th Edition
ISBN:9781133949640
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter19: Principles Of Chemical Reactivity: Electron Transfer Reactions
Section: Chapter Questions
Problem 79GQ
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  1. (a) A voltaic cell is constructed as follows: Zn | Zn2+ | H+ | H2

 

The half-cell reactions are:

 

Zn ---à Zn2+ + 2e–        E° = 0.76 V                 2H+ + 2e- à H2        E° = 0.0V

 

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+]?

 

  • 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.

 

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