1. The problem statement, all variables and given/known data Calculate the solubility of C6H5COOAg(s) in a buffer solution that has a pH of 3.20. (Ka = 6,5 x10^-5M ; Ksp = 2,5 x10^-5M^2) a) 0,0164M b) 0,0050M c) 0,0287M d) 0,0012M 2. Relevant equations Henderson-Hasselbach, Ksp equation 3. The attempt at a solution This is driving me nuts. I used Henderson-Hasselbach to find [C6H5COO], wrong answer, tried an equilibrium problem, wrong answer. Can someone give me a method for this. Thanks.