Question

Which of the following salt will form a basic solution upon hydrolysis?

• A. $Na{C}_2{H}_3{O}_2$
• B. ${HC}_2{H}_3{O}_2$
• C. $KCl$
• D. ${NH}_3$
• E. $HCl$

Answer 1

The correct option is A $Na{C}_2{H}_3{O}_2$


This is $C{H}_{3}COONa$ salt, which is called a Sodium acetate.
It is made up of acetic acid and $NaOH$ base through neutralisation.
Acetic acid ( $C{H}_{3}COOH$ ) is a weak acid whereas $NaOH$ is a strong base.
Being weak acid, the acetic acid is formed by the association of acetate ion and $H^{+}$ thus produced , due to the hydrolysis of $C{H}_{3}COONa$.
Hence , there are $N{a}^{+}$ and $O{H}^{-}$ ions in solution making the solution basic (alkaline).
$C{H}_{3}COONa+H_{2}O\to C{H}_{3}COOH+N{a}^{+}+O{H}^{-}$