Chemistry

Chemistry

Problem

The three salts below each have Ksp=2.5×10−8K_{sp}=2.5\times10^{-8} at 25 °C. CuS (dissociates to Cu2+^{2+} + S2−^{2-}) CaF2_2 (dissociates to Ca2+^{2+} + 2 F−^{-}) Bi2_2S3_3 (dissociates to 2 Bi3+^{3+} + 3 S2−^{2-}) Which ranking correctly orders the salts from greatest to least molar solubility in pure water? a) CaF2_2 > Bi2_2S3_3 > CuS b) CuS > CaF2_2 > Bi2_2S3_3 c) Bi2_2S3_3 > CaF2_2 > CuS d) Bi2_2S3_3 > CuS > CaF2_2

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