An aqueous solution contains $\mathrm{Hg}^{2+}, \mathrm{Hg}_{2}{ }^{2+}, \mathrm{Pb}^{2+}$ and $\mat

Question

An aqueous solution contains $\mathrm{Hg}^{2+}, \mathrm{Hg}_{2}{ }^{2+}, \mathrm{Pb}^{2+}$ and $\mathrm{Cd}^{2+}$. The addition of HCl of 3 N will precipitate\

Professor PC Thomas Classes · Answer

(c) : The group reagent for group I is dil. HCl , only $\mathrm{PbCl}_{2}$ and $\mathrm{Hg}_{2} \mathrm{Cl}_{2}$ will get precipitated as $\mathrm{Pb}^{2+}$ and $\mathrm{Hg}_{2}^{2+}$ both are group I basic radicals. Their solubility product is less than that of other radicals.