EXERCISE

Partial neutralisation of a polybasic acid gives

Complete the following equation:

$\mathrm{Ca}(\mathrm{OH}{)}_2+{\mathrm{Cl}}_2⟶$

Identify two salts among the following whose solutions have a pH greater than $7$.
(i) ${\mathrm{K}}_2\mathrm{S}$
(ii) ${\mathrm{NH}}_4\mathrm{Cl}$
(iii) ${\mathrm{KNO}}_3$
(iv) ${\mathrm{CaCO}}_3$
(v) ${\mathrm{NH}}_4{\mathrm{NO}}_3$

State the basicity of phosphorous acid.

Calculate the pH value of ${10}^{-8} \mathrm{M} \mathrm{HCl}$.

State the number of molecules of water that is present in gypsum.

Among the given acids, how many acids are strong acids?

${\mathrm{H}}_2{\mathrm{SO}}_4$, ${\mathrm{H}}_2{\mathrm{CrO}}_4$, $\mathrm{HCN}$, $\mathrm{HCl}$, Phenol, ${\mathrm{HNO}}_3$

When equal volumes of $0.5 \mathrm{N} \mathrm{NaOH}$ and $0.3 \mathrm{N} \mathrm{KOH}$ are mixed in an experiment, then what will be the pH of the resulting solution?