NEET Chemistry pH & Buffer Solutions Match the Following Question
Match Column-I with Column-II.
Column-I Column-II (a) Acetic Acid and Sodium Acetate (i) pH around 9.25 (b) Ammonium Hydroxide and Ammonium Chloride (ii) pH around 4.75 (c) Hydrolysis of Salt from Weak Acid and Weak Base (iii) pH = 7 + ½ (pK a – pK b) (d) Buffer Solution Preparation (iv) Requires knowledge of pK a and pK b
Choose the correct matching:
a-ii, b-i, c-iii, d-iv
a-i, b-ii, c-iv, d-iii
a-iv, b-ii, c-i, d-iii
a-ii, b-iv, c-i, d-iii
Correct Answer
Detailed Explanation
The acetic acid and sodium acetate form a buffer solution at pH around 4.75, while ammonium hydroxide and ammonium chloride form a buffer around pH 9.25. Hydrolysis of salts from weak acids and bases can be described by the equation pH = 7 + ½ (pK a – pK b). Knowledge of pK a and pK b is essential for preparing buffer solutions.
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