Question

(a) How many moles of mercury will be produced by electrolysing 1.0 M. Hg(NO₃)₂ solution with a current of 2.00 A for 3 hours?

(b) A voltaic cell is set up at 25° C with the following half-cells Al³⁺ (0.001 M) and Ni²⁺ (0.50 M). Write an equation for the reaction that occurs when the cell generates an electric current and determine the cell potential.

Answer 1

(a) Mass of mercury produced at the cathode,

Applying Nerst equation to the above cell reaction