Question:
In which of the following aqueous solutions of salt, is pH independent of the concentration of the salt?
In which of the following aqueous solutions of salt, is pH independent of the concentration of the salt?
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Buffer solutions resist changes in pH upon dilution or the addition of small amounts of acids or bases.
Updated On: Apr 7, 2026
- Ammonium chloride
- Ferric chloride
- Ammonium acetate
- Sodium acetate
Ammonium sulphate
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The Correct Option is C
Solution and Explanation
Step 1: Ammonium acetate (\(CH_3COONH_4\)) is a salt derived from a weak acid (acetic acid) and a weak base (ammonia).
Step 2: When dissolved in water, it completely dissociates into \(CH_3COO^-\) and \(NH_4^+\).
Step 3: Both the anion and the cation can react with water, but their effects on pH largely cancel each other out, resulting in a solution that acts as a buffer.
Step 4: Therefore, the pH of ammonium acetate solutions is relatively independent of its concentration compared to salts that yield ions from strong acids or bases.
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