Question
The molar solubility of PbS, which dissociates as MX ⇌ M²⁺/M⁺ + X²⁻/X⁻ in a 1:1 ratio, is 4.0e-06 mol L⁻¹. What is Ksp?
Select an option. Your answer will be checked instantly.
Correct Answer: B. 1.6e-11
Explanation:
For a 1:1 salt, both ion concentrations equal the molar solubility s.
Therefore Ksp = s².
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