Mohr's salt is dissolved in dil. `H_(2)SO_(4)` instead of distilled water to

Options

A. Enhance the rate of dissolution
B. Prevent cationic hydrolysis
C. Increase the rate of ionisation
D. Increase its reducing strength

Answer

B

Explanation

Mohr’s salt is a double salt of ferrous sulphate and ammonium sulphate `[FeSO_4(NH_4)_2 SO_4. 6H_2O]` both of which are salts of strong acid. In aqueous solution both will undergo hydrolysis. When the concentration of `H^(+)` ions is increased by adding a little acid. If will suppress the hydrolysis.