I don't get that answer. Are you sure you have typed in the correct values? I think that 0.0031 is closer to the Knet for the reaction and not Kf for the formation of the complex. I think that number is very much higher; i.e., something like 10^7 or so. If I use 0.0031 for the Keq for the reaction I obtained 0.5 M for the solubility; I expect that 0.0031 is the Keq for the dissolution and that is Ksp*Kf.
1.8E-10*1.7E7 = 0.0031
Question 2
What is the solubility of AgCl in 10 M NH3? The Kf of Ag(NH3)2+ from AgCl(s) in aqueous NH3 is 0.0031, which is for the balanced reaction shown below.
AgCl(s) + 2 NH3(aq) → Ag(NH3)2+(aq) + Cl-(aq)
Is the answer 0.557 M?
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