(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:

(c) A typical nicad voltaic cell generates an emf of + 1.30. 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.

Transcribed Image Text:

Cd(OH)2(s) + 2 e-_→ Cd(s) + 2 OH-(aq) Ered0.76 V NiO(OH)(s) + H20(I) + e-_ Ni(OH)2(s) + OH-(aq) Ered = +0.49 V