The pK_{b} of dimethylamine and pK_{a} of acetic acid are 3.27 and 4.77 respectively at T (K). The correct opt

Question

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 :

Accepted Answer

Dimethylammonium acetate is a salt of weak acid and weak base whose pH can be calculated as pH = 7 + 1/2(pK_{a} - pK_{b}) = 7 + 1/2(4.77 - 3.27) = 7.75.

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