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General Chemistry

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Complex Ion Equilibrium: Calculating Ion Concentration

CHEM-HOY9A1

What is the concentration of ${Ag}^{+}(aq)$ if $0.20\text{ moles}$ of ${Ag}^{+}(aq)$ is added to a $1\text{ L}$ solution containing $1.00 \text{ M }{CN}^{-}(aq)$?

${K}_{f}=5.60\times {10}^{18}$ for ${Ag{(CN)}_{2}}^{-}(aq)$

A

$8.4\times {10}^{-17}$

B

$3.3\times {10}^{-12}$

C

$4.1\times {10}^{-18}$

D

$9.9\times {10}^{-20}$