Question

Give two reactions showing oxidising property of concentrated H₂SO_4. Write the structures of HClO₃ and HClO₄.

Answer 1

Metals and non-metals both are oxidised by hot, concentrated sulphuric acid which itself gets reduced to SO₂.

1. \[\ce{\underset{Copper}{Cu} + \underset{\underset{Acid(Conc.)}{Sulphuric}}{2H2SO4} -> \underset{\underset{Sulphate}{Copper}}{CuSO4} + 2H2O}\]
2. \[\ce{\underset{Sulphuric}{S} + \underset{Sulpuric acid(Conc.)}{2H2SO4} -> \underset{Sulphur dioxide}{3SO2} + 2H2O}\]

Structures of HClO₃ and HClO₄

Chloric acid. HClO₃ 

Perchloric acid HClO₄