Question

Choose the correct statements for an aqueous solution of $KOCl$

• A. The solution will be basic in nature
• B. The solution will be acidic in nature.
• C. Cationic $\left(K^{+}\right)$ hydrolysis occurs.
• D. Anionic $\left(OC{l}^{-}\right)$ hydrolysis occurs

Answer 1

Answer: (A), (D)

Anionic $\left(OC{l}^{-}\right)$ hydrolysis occurs

$KOCl$ is a salt of strong base and weak acid.
On complete dissociation $KOCl\left(aq\right)\to OC{l}^{-}\left(aq\right)+K^{+}\left(aq\right)$
On hydrolysis $OC{l}^{-}\left(aq\right)+H_{2}O\left(l\right)\rightleftharpoons HOCl\left(aq\right)+O{H}^{-}\left(aq\right))$
Note:- Only the anion will undergo hydrolysis and the solution will be alkaline in nature due to $O{H}^{-}$ formation.
So here, the anion $OC{l}^{-}$ is responsible for the alkaline nature of the solution.
$\Rightarrow pH>7$
Formula:
$pH=7+\frac{1}{2}(p{K}_a+logC)$