Question

State Faraday's first law of electrolysis. How much charge in terms of Faraday is required for the reduction of 1 mol of Cu²⁺ to Cu.

Answer 1

Faraday's first law of electrolysis states that "the amount of chemical reaction which occurs at any electrode during electrolysis by a current is proportional to the quantity of electricity passed through the electrolytic solution or melt".

The reduction of one mol of Cu²⁺ to Cu can be represented as:
Cu2++ 2e−→CuCu2++ 2e-→Cu
Since, in this reaction there are two moles of electrons involved, so the amount of charge required is 2F.