Chemistry - Complete s-block Question with Solution | TestHub

The percentage of$\mathrm{M}{\mathrm{g}}^{2+}$ions in a solution can be tested by adding a solution of$\mathrm{N}{\mathrm{a}}_2\mathrm{H}\mathrm{P}{\mathrm{O}}_4$as follows
$\mathrm{M}{\mathrm{g}}^{2+}+\mathrm{N}{\mathrm{a}}_2\mathrm{H}\mathrm{P}{\mathrm{O}}_4+\mathrm{N}{\mathrm{H}}_4\mathrm{O}\mathrm{H}+5{\mathrm{H}}_2\mathrm{O}\to \underset{\mathrm{W}\mathrm{h}\mathrm{i}\mathrm{t}\mathrm{e }\mathrm{p}\mathrm{p}\mathrm{t}.}{\mathrm{M}\mathrm{g}\left(\mathrm{N}{\mathrm{H}}_4\right)\mathrm{P}{\mathrm{O}}_4}.6{\mathrm{H}}_2\mathrm{O}\downarrow +2\mathrm{N}{\mathrm{a}}^{+}$