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6-2.Equilibrium-II (Ionic Equilibrium)
medium
What is the molar solubility of $Ag_2CO_3\, (K_{sp} = 4 \times 10^{-13})$ in $0.1\, M\, Na_2CO_3$ solution ?
A
$10^{-6}$
B
$10^{-7}$
C
$2 \times 10^{-6}$
D
$2 \times 10^{-7}$
Solution
$A{g_2}C{O_3}(s)\overset {{K_q}} \longleftrightarrow \mathop {2A{g^ + }(aq)}\limits_{2s} + \mathop {CO_3^ – (aq)}\limits_{5 + 0.1 \simeq 0.1} $
$\mathrm{K}_{\mathrm{sp}}=4 \mathrm{s}^{2} \times 0.1$
$4 \times 10^{-13}=45^{2} \times 0.1$
$\mathrm{s}=1 \times 10^{-6}$
Standard 11
Chemistry