(a) Write the reactions for the discharge and charge of anickel–cadmium (nicad) rechargeable battery. (b) Giventhe following reduction potentials, calculate the standardemf of the cell:Cd(OH)2(s) + 2 e------>Cd(s) + 2 OH-(aq)E°red = -0.76 VNiO(OH)(s) + H2O(l) + e---->Ni(OH)2(s) + OH-(aq)E°red = +0.49 V(c) A typical nicad voltaic cell generates an emf of +1.30 V.Why is there a difference between this value and the oneyou calculated in part (b)? (d) Calculate the equilibriumconstant for the overall nicad reaction based on this typicalemf value.

Answered: (a) Write the reactions for the…

Principles of Modern Chemistry

8th Edition

ISBN:9781305079113

Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Chapter17: Electrochemistry

Section: Chapter Questions

Problem 59P

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(a) Write the reactions for the discharge and charge of a
nickel–cadmium (nicad) rechargeable battery. (b) Given
the following reduction potentials, calculate the standard
emf of the cell:
Cd(OH)₂(s) + 2 e^------>Cd(s) + 2 OH^-(aq)
E°red = -0.76 V
NiO(OH)(s) + H₂O(l) + e---->Ni(OH)₂(s) + OH^-(aq)
E°red = +0.49 V
(c) A typical nicad voltaic cell generates an emf of +1.30 V.
Why is there a difference between this value and the one
you calculated in part (b)? (d) Calculate the equilibrium
constant for the overall nicad reaction based on this typical
emf value.

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