Three sparingly soluble carbonates are placed in separate beakers containing at

CHEMISTRY · Single correct · AP · Chemistry · Equilibrium · Equilibrium

Problem

Three sparingly soluble carbonates are placed in separate beakers containing 0.020 M0.020\,\text{M} CO32−CO_3^{2-} at 25∘C25^\circ\text{C}. Their solubility–product constants are: Ag2CO3Ag_2CO_3: Ksp=8.1×10−12K_{sp} = 8.1\times10^{-12} CaCO3CaCO_3: Ksp=3.8×10−9K_{sp} = 3.8\times10^{-9} SrCO3SrCO_3: Ksp=5.0×10−9K_{sp} = 5.0\times10^{-9} Rank the molar solubilities of the three carbonates in this common-ion solution from greatest to least. (a) SrCO3Sr_CO_3 > CaCO3Ca_CO_3 > Ag2CO3Ag_2CO_3 (b) Ag2CO3Ag_2CO_3 > SrCO3Sr_CO_3 > CaCO3CaCO_3 (c) Ag2CO3Ag_2CO_3 > CaCO3CaCO_3 > SrCO3Sr_CO_3 (d) SrCO3Sr_CO_3 > Ag2CO3Ag_2CO_3 > CaCO3CaCO_3

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