Question

Why is aqueous solution of copper sulphate acidic in nature?

Answer 1

copper sulfate is acidified because Copper sulphate is a salt of a strong acid, H2SO4, and a weak base,Cu(OH)2.

Copper sulphate hydrolyse in water to give cupric hydroxide which is weak base and sulphuric acid which is strong acid.

CuSO4 + 2 H2O = Cu(OH)2 + H2SO4

This reaction can otherways written as,

{ Cu(2+) + H2O = CuOH(+) + H(+) }

The release of H+ ions by hydrolysis makes the solution distinctly acidic.