Which among the following salts undergoes hydrolysis?
Which among the following salts undergoes hydrolysis?
$\mathrm{Na}_2 \mathrm{SO}_4$
$\mathrm{KCl}$
$\mathrm{NH}_4 \mathrm{Cl}$
$\mathrm{KNO}_3$
Solution
- Salt which is obtained from any weak acid or weak base undergoes hydrolysis.
$\begin{aligned}
& \mathrm{NH}_4 \mathrm{Cl} \rightarrow \text { Salt of } \mathrm{SA}(\mathrm{HCl})+\mathrm{WB}\left(\mathrm{NH}_4 \mathrm{OH}\right) \\
& \mathrm{Na}_2 \mathrm{SO}_4 \rightarrow \text { Salt of } \mathrm{SA}\left(\mathrm{H}_2 \mathrm{SO}_4\right)+\mathrm{SB}(\mathrm{NaOH}) \\
& \mathrm{KCl} \rightarrow \text { Salt of } \mathrm{SA}(\mathrm{HCl})+\mathrm{SB}(\mathrm{KOH}) \\
& \mathrm{KNO}_3 \rightarrow \text { Salt of } \mathrm{SA}(\mathrm{HNO})+\mathrm{SB}(\mathrm{KOH})
\end{aligned}$