Question

Name the acid anhydrides of the folloing acids:

1. sulphurous acid
2. nitric acid
3. phosphoric acid
4. carboric acid

Answer 1

Sulphurous acid (H₂SO₃) : SO₂ (sulphur dioxide) gas is anhydride of Sulphurous acid
Nitric acid (HNO3) : Dinitrogen pentaoxide is anhydride of nitric acid
Phosphoric acid (H₃PO₄) : Phosphorus pentoxide( P₂O₅) is the anhydride of phosphoric acid

Carbonic acid ( H₂CO₃): CO₂ (carbon dioxide ) is anhydride of Carbonic acid.