What is the $pH$ of a $K_2S$ solution?

Which of the following salts contains an anion that undergoes hydrolysis?

The dissociation constant of a substituted benzoic acid at $25^{\circ}C$ is $1.0 \times 10^{-4}$. The $pH$ of a $0.01 \ M$ solution of its sodium salt is

Which of the following salts undergoes hydrolysis in water?

The aqueous solutions of $Na_3BO_3$,$Na_3PO_4$,$NaCN$,and $CH_3COONa$ will be .......

The dissociation constant of $NH_4OH$ is $1.8 \times 10^{-5}$. Calculate the hydrolysis constant of $NH_4Cl$.