Which of these salts will form an acidic solution upon dissolving in water

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Expert Solution

This question is an example of salt-hydrolysis, when salt is hydrolysed with water it may produce acidic, basic or neutral solution depends on their chemical formula, it means pH of the medium.

Salts which form of strong acids and weak bases when hydrolysed produce acidic solution.

ex: Ammonium nitrate (NH₄NO₃), Ammonium chloride (NH₄Cl)

Salts which form of strong acids/weakacids and strong bases/weak bases, respectively when hydrolysed produce neutral solution.

EX: NaCl, CH₃COONH₄

Salts which form of weak acids and strong bases when hydrolysed produce basic solution.

EX: Na₂CO₃, CH₃COONa, (CH₃COO)₂Ca, NaHCO₃

Na₂CO₃ + H₂O NaOH + H₂CO₃

Salt water strong base weak acid (Solution will be basic)

Reactions

NH₄Cl + H₂O NH₄OH + HCl

Salt water weak base strong acid

It produces strong acid which ionise fastly and releases H⁺, while ammonium hydroxide is a weaker base liberates OH^- slowly therefore solution will be acidic, pH willbe below 7.

NH₄NO₃ + H₂O NH₄OH + HNO₃ (nitric acid)

It produces strong acid which ionise fastly and releases H⁺, while ammonium hydroxide is a weaker base liberates OH^- slowly therefore solution will be acidic, pH will be below 7.

queen_honey_blossom answered 1 year ago

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