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Given the following values of Ksp for four slightly soluble sulphides at 25 °C.…

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Wize High School Grade 12 Chemistry Textbook > Acids and Bases

Solubility Product Constant, Ksp

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Given the following values of Ksp for four slightly soluble sulphides at 25 °C.
SulphideKspCdS3.6×10–29CuS8.7×10–36PbS8.4×10–28MnS5.1×10–15\def\arraystretch{1.5} \begin{array}{c} \rm Sulphide &&K_{sp} \\ \hline CdS&& 3.6 \times10^{–29}\\ CuS && 8.7 \times10^{–36} \\ PbS&& 8.4 \times 10^{–28} \\ MnS&&5.1 \times10^{–15}\\ \end{array}

Which one of the following ions exists in the lowest concentration in a solution in which the sulphide ion concentration had been fixed at some (fairly large) constant value at 25°C?
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Solubility
A student is preparing to test the molar solubility of PbHPO4 (s) (Ksp=3.5×10−12) in different aqueous solutions. When this salt dissociates, it produces Pb2+ (aq) and the amphiprotic ion HPO42− (aq).They prepare separate beakers with 100 mL of each of the following solutions to test:
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