After mixing, a solution contains = 1.0 × 10⁻³ and = 1.0 × 10⁻³ mol dm⁻³. Given Ksp(BaSO₄) = 1.1 × 10⁻¹⁰, what happens?
Correct answer A. The ionic product is 1.0 × 10⁻⁶, so BaSO₄ precipitates
Explanation
Ionic product = [Ba²⁺][SO₄²⁻] = (1.0 × 10⁻³)(1.0 × 10⁻³) = 1.0 × 10⁻⁶. This exceeds Ksp of 1.1 × 10⁻¹⁰, so barium sulphate precipitates.
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