The $pK_b$ of dimethylamine and $pK_a$ of acetic acid are 3.27 and 4.77 respectively at T(K). The correct option for the pH of dimethylammonium acetate solution is:

Question

Dr. Abubacker · Accepted Answer

[Solution] For a salt of a weak acid and weak base, $pH = 7 + \frac{1}{2}(pK_a - pK_b) = 7 + \frac{1}{2}(4.77 - 3.27) = 7.75$. Answer (2).

Q. The $pK_b$ of dimethylamine and $pK_a$ of acetic acid are 3.27 and 4.77 respectively at T(K). The correct option for the pH of dimethylammonium acetate solution is:

Explanation

Reviewed by Dr. Abubacker

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