If the solubility product of CuS is 6 × 10-16, calculate the maximum molarity of CuS in aqueous solution.
The Solubility product of CuS (ksp) = 6 × 10-16
CuS → Cu + + + S2-
Let the s be solubility of CuS in mol/L
Ksp = [ Cu + + ][S2]
Ksp = solubility product
6 × 10-16 = s × s = s2
⇒ S = 2.45 × 10-8 mol/L
Hence, the maximum molarity of CuS in an aqueous solution is 2.45 × 10-8 mol/L
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