Question

The pH of the solution _______ during the electrolysis of dilute aqueous solution of $Cu{SO}_4$.

• A. first increases then decreases
• B. decreases
• C. remains constant
• D. increases

Answer 1

The correct option is B decreases

After the electrolysis i.e. the process in which electric current is passed through an aqueous solution of some compound or elements which leads to breakdown into anions and cations.

The copper sulphate solution will break down into $C{u}^{2+}$ cation and $S{O}_4^{-2}$ anion.

As a result, the solution of copper sulphate which is blue in colour will no longer retain.This $S{O}_4^{-2}$ combines with $H_2$ and increases the acidity.

Hence, option $B$ is correct.