What will be the $pH$ of an aqueous solution of $1.0 \ M$ ammonium formate? (Given: $pK_a = 3.8$ and $pK_b = 4.8$)

The solution of the salt formed from a strong acid and a weak base,$FeCl_3$,is:

$20\,mL$ of $0.1\,M\,NH_{4}OH$ is mixed with $40\,mL$ of $0.05\,M\,HCl$. The $pH$ of the mixture is nearest to. (Given: $K_{b}(NH_{4}OH) = 1 \times 10^{-5}, \log 2 = 0.30, \log 3 = 0.48, \log 5 = 0.69, \log 7 = 0.84, \log 11 = 1.04$) (in $.2$)

If the $K_b$ value in the hydrolysis reaction $B^{+} + H_2O \rightleftharpoons BOH + H^{+}$ is $1.0 \times 10^{-6}$,then the hydrolysis constant of the salt would be

Hydrolysis of sodium acetate will give:

The aqueous solution of $CuSO_4$ is