Question

give reasons please​

Answer 1

Ammonium chloride is a salt of a strong acid (HCl) and a weak base (NH3).

In water, the cation of such a salt undergoes hydrolysis to liberate free hydrogen (hydronium) ion to a significant extent.

NH4Cl + H2O = NH3 + H3O(+)cl2

The presence of such additional hydrogen ions that are formed due to hydrolysis is responsible for the distinct acidic nature of an aqueous solution of a salt of a strong acid and a weak base like ammonium chloride.

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