If the $pK_a$ value of $CH_3COOH$ is $4.74$,then the $pH$ value of $0.1 \ M \ CH_3COONa$ is ......

$pH$ of a salt solution of weak acid $(pK_a = 4)$ and weak base $(pK_b = 5)$ at $25^{\circ}C$ is:

$A$ white salt is readily soluble in water and gives a colorless solution with a $pH$ of about $9$. The salt is ...........

Which of the following is not an acidic salt?

The hydrolysis reaction $A^{-} + H_2O \rightleftharpoons HA + OH^{-}$ indicates that the salt is formed from:

It is found that at $25\,\text{°C}$,$0.1\,M$ solutions of four sodium salts $NaA$,$NaB$,$NaC$,and $NaD$ have the $pH$ values $7$,$9$,$10$,and $11$ respectively. Which one of the corresponding acids is the strongest?