First slide

Salt hydrolysis :

Question

HA is a weak acid and BOH is a weak base. For which of the following salts the extent of hydrolysis is independent of the concentration of the salt in its aqueous solution

Easy

A

NaA
B

NaB
C

BCl
D

BA

Solution

The extent of the hydrolysis (h) of the salt made by weak acid and weak base is independent of the concentration of salt.
$\underset{weak acid}{HA} + \underset{weak base}{BOH} \overset{}{\to} BA + H_{2} O K_{h} = hydrolysis constant = \frac{K_{w}}{K_{a} K_{b}}$

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