Practice question
Question
The solubility of Ag₂S in 0.01 M Na₂S is 2.0 × 10⁻¹⁶ M . What is its Ksp ?
Explanation
For Ag₂S <=> 2Ag+ + S²⁻ , [Ag+] = 4.0 × 10⁻¹⁶ , [S²⁻] ≈ 0.01 , Ksp = (4.0 × 10⁻¹⁶)² × 0.01 = 1.6 × 10⁻³³ .
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