First slide

Salt hydrolysis :

Question

If the pK_a of CH₃COOH and pK_b of NH₄OH are the same as 4.76, the pH of an aqueous solution of ammonium acetate is

Easy

A

11.76
B

7.0
C

4.76
D

8

Solution

P^H of an aqueous solution of CH₃COONH₄ is given as
$\large {P^H} = \frac{1}{2}\left[ {{P^{{K_w}}} + {P^{{K_a}}} - {P^{{K_b}}}} \right]$
$\large {P^H} = 7$

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