(a) Calculate the emf of the cell in which the following reaction takes place.

Ni (s) 2Ag⁺ (0.002 M) Ni²⁺ (0.160 M) + 2Ag (s)

Given that, E°_cell = 1.05 V

(b) Define electrochemical cell. What happens if external potential applied becomes greater than ${\mathrm{E}}_{\mathrm{cell}}^{\circ }$ of electrochemical cell?

(c) Calculate the potential of hydrogen electrode, which is in contact with a solution whose pH is 10.

OR

The resistance of a conductivity cell, when filled with 0.05 M solution of an electrolyte x, is 100 at 40°C. The same conductivity cell when filled with 0.01 M solution of electrolyte y, has a resistance of 50. The conductivity of 0.05 M solution of electrolyte x is 1.0 x 10^-4 S cm ^-1.

Calculate

(a) Cell constant.

(b) Conductivity of 0.01 M y solution

(c) Molar conductivity of 0.01 M y solution