Electrolysis of Magnesium sulphate solution using inert electrodes.

Here are the solutions to your electrochemistry questions:

1. Electrolysis of Magnesium sulphate solution using inert electrodes.

(i) Name a suitable pair of electrode that can be used in the above process.

• A suitable pair of inert electrodes would be Graphite (Carbon) or Platinum.

(ii) State and explain the changes on the concentration of magnesium sulphate solution as the process proceeds.

• The concentration of magnesium sulphate solution will increase.
• Explanation: During the electrolysis of aqueous magnesium sulphate, water is preferentially electrolyzed over $\text{Mg}^{2+}$ and $\text{SO}_4^{2-}$ ions. At the cathode, hydrogen gas is produced ($2H_2O(l) + 2