Why is ammonium chloride solution acidic?
Answer and explanation
Correct answer: It is a salt of a strong acid and a weak base
The governing concept is salt hydrolysis. Ammonium chloride is formed from strong hydrochloric acid and the weak base ammonium hydroxide. In water, NH₄⁺ reacts partially with water: NH₄⁺ + H₂O ⇌ NH₃ + H₃O⁺. The hydronium ions make the solution acidic, so option A is correct. It is not a pure base, and the salt does ionise in water.
Frequently asked questions
What is the correct answer to this question?
It is a salt of a strong acid and a weak base
Why is this the correct answer?
The governing concept is salt hydrolysis. Ammonium chloride is formed from strong hydrochloric acid and the weak base ammonium hydroxide. In water, NH₄⁺ reacts partially with water: NH₄⁺ + H₂O ⇌ NH₃ + H₃O⁺. The hydronium ions make the solution acidic, so option A is correct. It is not a pure base, and the salt does ionise in water.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Acids, Bases, and Salts.
