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A solution contains a mixture of \( \mathrm{Ag}^{+}(0.10 \mathrm{M}) \) and
P \( \mathrm{Hg}_{2}{ }^{2+}(0.10 \mathrm{M}) \), which are to be separated by

W selective precipitation. Calculate the maximum concentration of iodide ion at which one of them gets precipitated almost completely. What per cent of that metal ion is precipitated before the start of precipitation of second metal ion?
\( K_{s p}(\mathrm{AgI})=8.5 \times 10^{-17} \) and \( K_{s p}\left(\mathrm{Hg}_{2} \mathrm{I}_{2}\right)=2.5 \times 10^{-26} \).
(1) \( 5 \times 10^{-13} \mathrm{M}, 99.83 \% \)
(2) \( 8.5 \times 10^{-16} \mathrm{M}, 99.83 \% \)
(3) \( 2.5 \times 10^{-13} \mathrm{M}, 100 \% \)
(4) \( 5 \times 10^{-13} \mathrm{M}, 98.3 \% \)
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