Sufficient sodium cyanide, NaCN, was added to 0.015 M silver nitrate, AgNO 3 , to give a

Question:

Sufficient sodium cyanide, NaCN, was added to 0.015 M silver nitrate, AgNO₃, to give a solution that was initially 0.108 M in cyanide ion, CN⁻. What is the concentration of silver ion, Ag⁺, in this solution after Ag(CN)₂⁻ forms? The formation constant K_f for the complex ion Ag(CN)₂⁻ is 5.6 × 10¹⁸.