Chemistry

Problem

Which of the following mixtures can be separated by using excess

\text{NH}_3

solution ? a.

\text{Bi}^{3+}

(aq.) and

\text{Al}^{3+}

(aq.) b.

\text{Al}^{3+}

(aq.) and

\text{Zn}^{2+}

(aq.) c.

\text{Hg}^{2+}

(aq.) and

\text{Pb}^{2+}

(aq.) d.

\text{Cu}^{2+}

(aq.) and

\text{Cd}^{2+}

(aq.)