When $CuSO_4$ is hydrated,it becomes:

The aqueous solution of $AlCl_3$ is acidic due to the hydrolysis of

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

What will be the $pH$ and $\alpha$ (degree of hydrolysis) respectively for the salt $BA$ of $0.1 \ M$ concentration? (Given: $K_a$ for $HA = 10^{-6}$ and $K_b$ for $BOH = 10^{-6}$)

On dilution,the $pH$ of $CH_3COONa$ solution:

The correct formula to calculate the hydroxyl ion concentration of an aqueous solution of $NH_4NO_3$ is