Amonium salts on reaction with sodium hydroxide given
NH4Cl + NaOH → A–– + NaCl + H2O A is
NH3
Ammonia gas is always released, when ammonium salts react with sodium hydroxide.
NH4Cl + NaOH → NH3↑ + NaCl + H2O
(NH4)2SO4 + 2NaOH → Na2SO4 + 2NH3↑ + 2H2O