Question

Question 36
Which one of the following figures correctly describes the process of electrolytic refining?

Answer 1

Option (c) is correct.

Electrolytic refining is the process to obtain pure metals by the process of electrolysis.
In this process, the impure metal is made the anode and a thin strip of pure metal is made the cathode.
The electrolyte copper(II) sulphate, provides a high concentration of copper(II) ions $\left({\text{Cu}}^{2+}\right)$ and sulphate ions $\left({\text{SO}}_4^{2-}\right)$ that carry the current during the electrolysis process.

Using the simple apparatus, the products of the electrolysis of copper sulphate solution are:
1. a copper deposit on the negative cathode electrode
2. oxygen gas at the positive anode electrode.