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प्रश्न
Write the chemical formula of ammonium chloride. Explain why an aqueous solution of ammonium chloride is acidic in nature? Illustrate your answer with the help of a chemical equation.
उत्तर
The chemical formula of ammonium chloride is NH4Cl. It is formed from a weak base, ammonium hydroxide (NH4OH), and a strong acid, hydrochloric acid (HCl). On dissolving in water, NH4Cl hydrolyses to some extent to form ammonium hydroxide (NH4OH) and hydrochloric acid (HCl).
Hydrochloric acid is a strong acid that is fully ionised to give a large amount of H+ (hydrogen) ions and ammonium hydroxide is a weak base that is slightly ionised to give a small amount of OH-(hydroxide) ions. As ammonium chloride contains more H+ ions than OH- ions, it is acidic with a pH less than 7.
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