Account for the basicity of oxoacids of sulphur.

The basicity of acid is decided by the replaceable H⁺ ions and these are connected through O to the central Sulphur. The basicity is confirmed by the formation of two type of salt also. For ex Sulphuric acid forms two type of salt as below
H₂SO₄ + NaOH ----> NaHSO₄ + H₂O
H₂SO₄ + 2 NaOH ----> Na₂SO₄ + 2 H₂O