Practice question
Question
For A₂B(s) <=> 2A+(aq) + B²⁻(aq) , if Ksp = 1.0 × 10⁻⁹ , what is the solubility of A₂B in mol/L?
Explanation
Ksp = [A+]²[B²⁻] = (2S)² S = 4S³ = 1.0 × 10⁻⁹ , S³ = 2.5 × 10⁻¹⁰ , S ≈ 6.3 × 10⁻⁴ .
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