Question

Orthophosphoric acid is a ______ basic acid and forms ______ types of salts.

Answer 1

Orthophosphoric acid is a tri basic acid and forms three types of salts.

Explanation:

Orthophosphoric acid (H₃PO₄) contains three ionisable -OH groups, making it tribasic. It can lose up to three protons, and therefore it forms three types of salts, NaH₂PO₄, Na₂HPO₄, and Na₃PO₄, depending on the extent of neutralisation by a base.