If the pK_a of acetic acid and pK_b of dimeth | vedclass

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Question

(A) The salt dimethylammonium acetate is formed from a weak acid (acetic acid) and a weak base (dimethylamine). The $pH$ of such a salt solution is gi

Vedclass · Accepted Answer

$7.75$

Vedclass · Answer

(A) The salt dimethylammonium acetate is formed from a weak acid (acetic acid) and a weak base (dimethylamine). The $pH$ of such a salt solution is given by the formula: $pH = 7 + \frac{1}{2} [pK_a - pK_b]$.Given: $pK_a = 4.76$ and $pK_b = 3.26$.Substituting the values into the formula:$pH = 7 + \frac{1}{2} [4.76 - 3.26]$$pH = 7 + \frac{1}{2} [1.50]$$pH = 7 + 0.75 = 7.75$.

If the $pK_a$ of acetic acid and $pK_b$ of dimethylamine are $4.76$ and $3.26$ respectively,the $pH$ of dimethylammonium acetate solution is

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