Chemistry - Ionic Equilibrium Question with Solution | TestHub

Due to common ion effect of$\mathrm{N}{\mathrm{H}}_4^{+}$, concentration of$\mathrm{O}{\mathrm{H}}^{-}$decreases, as${\mathrm{K}}_{\mathrm{s}\mathrm{p}}\mathrm{F}\mathrm{e}(\mathrm{O}\mathrm{H}{)}_3<{\mathrm{K}}_{\mathrm{s}\mathrm{p}}\mathrm{A}\mathrm{l}(\mathrm{O}\mathrm{H}{)}_3$thus$\mathrm{F}\mathrm{e}(\mathrm{O}\mathrm{H}{)}_3$get precipitated first.