Question

Select the correct answer from the list given in brackets :

The ion which is discharged at the anode during the electrolysis of copper sulphate solutions using copper electrodes as anode and cathode.

• A. ${Cu}^{2+}$
• B. ${OH}^{-}$
• C. ${SO}_4^2$
• D. $H^{+}$

Answer 1

The correct option is A

${\mathrm{Cu}}^{2+}$

Step 1 Definition

1. Electrolysis is a process where the electrolytes dissociate to form ions.
2. The rods - cathode (negative rod) and anode (positive rod) are used in this process.
3. Electrolytes are good conductors of electricity.

Step 2 Correct option

In the electrolysis of Copper Sulphate,

The copper electrode is an active electrode, and hence it loses more electrons and can ionize itself to release copper ions (${\mathrm{Cu}}^{2+}$).

Reaction at the anode:

$Cu\left(s\right)-2e^{-}\to {\mathrm{Cu}}^{2+}\left(aq\right)$

${\mathrm{Cu}}^{2+}$ is the ion which is discharged at the anode during the electrolysis of copper sulphate solutions using copper electrodes as anode and cathode.