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
- A2 10^3 M
- B4 10⁻⁶ M
- C2 10⁻⁶ M
- 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