Question
The molar solubility of BaSO₄, which dissociates as MX ⇌ M²⁺/M⁺ + X²⁻/X⁻ in a 1:1 ratio, is 2.0e-05 mol L⁻¹. What is Ksp?
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Correct Answer: D. 4.0e-10
Explanation:
For a 1:1 salt, both ion concentrations equal the molar solubility s.
Therefore Ksp = s².
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