The pKa of acetic acid and pKb of ammonium hydroxide are 4.76 and 4.75 respectively. The pH of ammonium acetate solution is

Question

The pKa of acetic acid and pKb of ammonium hydroxide are 4.76 and 4.75 respectively. The pH of ammonium acetate solution is (A)  5  (B) 7 (C) 13 (D)  8

Tardigrade Admin · Accepted Answer

pH = 7+(1/2) (pKa-p K b) = 7 + (1/2) (4.76 - 4.75) = 7 + (1/2) (0.01) = 7 + 0.005 = 7.005

Q. The $p K_{a}$ of acetic acid and $p K_{b}$ of ammonium hydroxide are $4.76$ and $4.75$ respectively. The $p H$ of ammonium acetate solution is

$5$

$7$

$13$

$8$

$p H = 7 + \frac{1}{2} (p K a - p K b)$
$= 7 + \frac{1}{2} (4.76 - 4.75)$
$= 7 + \frac{1}{2} (0.01) = 7 + 0.005 = 7.005$

Q. The pKa​ of acetic acid and pKb​ of ammonium hydroxide are 4.76 and 4.75 respectively. The pH of ammonium acetate solution is

5

7

13

8

pH=7+21​(pKa−pKb) =7+21​(4.76−4.75) =7+21​(0.01)=7+0.005=7.005

Q. The $p K_{a}$ of acetic acid and $p K_{b}$ of ammonium hydroxide are $4.76$ and $4.75$ respectively. The $p H$ of ammonium acetate solution is

$5$

$7$

$13$

$8$

$p H = 7 + \frac{1}{2} (p K a - p K b)$
$= 7 + \frac{1}{2} (4.76 - 4.75)$
$= 7 + \frac{1}{2} (0.01) = 7 + 0.005 = 7.005$