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.
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:
Since, in this reaction there are two moles of electrons involved, so the amount of charge required is 2F.