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6-2.Equilibrium-II (Ionic Equilibrium)
medium
The solubility product of $AgI$ at $25\,^oC$ is $1.0 \times {10^{ - 16}}\,mo{l^2}\,{L^{ - 2}}$. The solubility if $AgI$ in ${10^{ - 4}}\,N$ solution of $KI$ at $25\,^oC$ is approximately (in $mol$ ${l^{ - 1}})$
A
$1.0 \times {10^{ - 8}}$
B
$1.0 \times {10^{ - 16}}$
C
$1.0 \times {10^{ - 12}}$
D
$1.0 \times {10^{ - 10}}$
(AIPMT-2003)
Solution
(c) $AgI$ $ \rightleftharpoons $ $\mathop {A{g^ + }}\limits_{(s)} + \mathop {{I^ – }}\limits_{(s)\,\,} $; ${K_{sp}} = {S^2} = {10^{ – 4}} \times S$
$S = \frac{{1.0 \times {{10}^{ – 16}}}}{{{{10}^{ – 4}}}} = 1 \times {10^{ – 12}}\frac{{mo{l^2}}}{{{l^2}}}$
Standard 11
Chemistry
