Question

Write a balanced chemical equation for the following.

A 50% solution of sulphuric acid is subjected to electrolyte oxidation and the product is hydrolysed.

Answer 1

• Electrolytic oxidation:
  At anode: 
  \[\ce{2HSO4^{-}->[Electrolysis]\underset{\text{Peroxydisulphuric acid}}{H2S2O8} + 2e^-}\]
• Hydrolysis:
  
  \[\ce{\underset{\text{Peroxydisulphuric acid}}{HO - SO2 - O - O} - SO2 - OH + 2H2O->2H2SO4 + \underset{\text{Hydrogen peroxide}}{H2O2}}\]