Question

Which pair of ions among the following can be separated by precipitation method?

• A. Eu(II) and Dy(III)
• B. Gd(III) and Dy(III)
• C. Eu(II) and Yb(II)
• D. Eu(II) and Gd(II)

Hint:

Lanthanide separation: \begin{itemize} \item Similar Ln$^{3+}$ ions hard to separate \item Exceptions: Eu$^{2+}$ and Yb$^{2+}$ \item Use oxidation state differences \end{itemize}

Answer 1

The Correct Option is A