Question

Write equations for the reactions taking place at the two electrodes mentioning clearly the name of electrode during the electrolysis of:-

Acidified copper sulfate solution with copper electrode.

Answer 1

Electrolysis:- It is a process in which electric current directly passed through the substance to make it chemically active. In this process electrolytes get converted into ions.

${\mathrm{CuSO}}_4\rightleftharpoons {\mathrm{Cu}}^{2+}+{\mathrm{SO}}_{4-}$

At cathode:-

${\mathrm{Cu}}^{2+}+2{\mathrm{e}}^{-}\to \mathrm{Cu}$(Reduction)

At anode:-

$\mathrm{Cu}-2{\mathrm{e}}^{-}\to {\mathrm{Cu}}^{2+}$(Oxidation)

Here, both copper electrodes are used.