Chemistry

Problem

Which of the following mixtures cannot be separated by passing

\text{H}_2\text{S}

through their solutions containing dilute HCl ? a.

\text{Cu}^{2+}

and

\text{Sb}^{3+}

\text{Pb}^{2+}

and

\text{Cd}^{2+}

\text{Pb}^{2+}

and

\text{Al}^{3+}

\text{Zn}^{2+}

and

\text{Mn}^{2+}