Question

Identify the cations in each of the following cases :
(i) $NaOH$ solution when added to the Solution (A) gives a reddish brown precipitate.
(ii) $N{H}_{4}OH$ Solution when added to the Solution (B) gives white precipitate which does not dissolve in excess.
(iii) $NaOH$ Solution when added to Solution (C) gives white precipitate which is insoluble in excess.

Answer 1

(i) $F{e}^{3+}$ with NaOH gives reddish brown precipitate of $Fe(OH{)}_3$.

(ii) $P{b}^{+2}$ with $N{H}_{4}OH$ gives gelatinous white precipitate of $Pb(OH{)}_2$.

(iii) $C{a}^{+2}$ with $NaOH$ gives white precipitate of $Ca(OH{)}_2$ which dissolves in excess.