Q27 of 53 Page 59

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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