Chemistry

Problem

Which of the following pairs of cations cannot be separated by using dilute

\text{HCl}

? a.

\text{Hg}_2^{2+}, \text{Pb}^{2+}

\text{Hg}^{2+}, \text{Ag}^+

\text{Ag}^+, \text{Cu}^{2+}

\text{Hg}_2^{2+}, \text{Bi}^{3+}