MCQ
A buffer solution can be prepared from a mixture of
- ASodium acetate and acetic acid in water
- BSodium acetate and hydrochloric acid in water
- CAmmonia and ammonium chloride in water
- ✓$(a) $ and $(c)$ both
✓
Answer
Correct option: D.
$(a) $ and $(c)$ both
d
Correct options are A) and C)
Correct options are A) and C)
Hint: A buffer solution can be prepared by mixing a weak acid or base with the salt of a strong base or strong acid.
Explanation:
Sodium acetate and acetic acid in water can form buffer solution because sodium acetate is a salt of strong acid $NaOH$ and weak acid acetic acid.
$CH _3 COONa + CH _3 COOH$
Sodium acetate and hydrochloric acid in water cannot form a buffer solution because $HCl$ is a strong acid.
Ammonia and ammonium chloride in water can from buffer solution because ammonia is a weak base and ammonium chloride is a salt of ammonia and strong acid $HCl$.
$NH _4 Cl + NH _3$
Ammonia and sodium hydroxide in water cannot form buffer solutions because both are bases.
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