Question

Identify the salt whose aqueous solution will have pH more than 7.

• A. $K_{2}S{O}_4$
• B. $K_{2}C{O}_3$
• C. $NaCl$
• D. $N{H}_{4}Cl$

Answer 1

The correct option is B $K_{2}C{O}_3$

$K_{2}C{O}_3$ is formed from strong base and weak acid. Hence in presence of water, it will give large concentration of $O{H}^{-}$ ions. So pH is more than $7$. Even all the salts of carbonates and bicarbonates are basic in nature so they have pH more than $7$.