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Manipal MET2013ChemistryIonic Equilibrium

Determine solubility of AgBr in a 0.1 M KCN solution. [K_f . of [ Ag ( CN )₂ ]⁻=5.6 10^8 ; K_ sp of . AgBr =7.7 10⁻¹³ ]

Options

  1. A2 10^3 M
  2. B4 10⁻⁶ M
  3. C2 10⁻⁶ M
  4. D4 10⁻³ M

Correct answer

A. 2 10^3 M

Step-by-step solution

AgBr +2 CN ⁻ s Ag ( CN )₂⁻ + Br _ s ⁻ aligned 0.1-2 s K_ sp & =k_ sp k=4.3 10⁻⁴ 4.3 10⁻⁴ & = ( s 0.1-2 s ) s & =2 10⁻³ aligned

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