What Is the Minimum Concentration of CN- That Will Prevent

question 31

Multiple Choice

What is the minimum concentration of CN- 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)

• A) 3.1 × 10^-3 M
• B) 9.4 × 10^-6 M
• C) 1.8 × 10^-10 M
• D) 1.2 × 10^-3 M
• E) 9.6 × 10^-3 M

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