What is the minimum concentration of CN-(aq) that will prevent the precipitation of AgX(s) from a solution that is 0.149 M in X-(aq) and 0.0184 M in Ag+(aq)? (Ksp for AgX(s) = 5.2 × 10-17; Kf for Ag(CN)2- = 5.6 × 1018)
◦ 3.1 × 10-3 M
◦ 9.4 × 10-6 M
◦ 1.8 × 10-10 M
◦ 1.2 × 10-3 M
◦ 9.6 × 10-3 M