Practice question

MCQ

Question

The solubility of Ag₂CO₃ in a 0.1 M AgNO₃ solution is 2.0 × 10⁻⁶ M . What is its Ksp ?

Options

Choose one · Correct answer highlighted

4.0 × 10⁻⁶ 1.0 × 10⁻⁷ 2.0 × 10⁻⁸ Correct 8.0 × 10⁻¹²

Explanation

For Ag₂CO₃ <=> 2Ag+ + CO₃²⁻ , [Ag+] = 0.1 + 2S ≈ 0.1 M , [CO₃²⁻] = S = 2.0 × 10⁻⁶ . Ksp = [Ag+]²[CO₃²⁻] = (0.1)² (2.0 × 10⁻⁶) = 2.0 × 10⁻⁸ .

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