Could someone help me with a Chemistry question?

Question

What is the solubility of CuCl when it is in a solution of 0.35 M NaCl? Oh, and, by the way, CuCl has Ksp = 1.9 x 10^-7.

Answer 1

Oh, BTW, thanks for that tidbit of info.
Now [Cu+][Cl-] = 1.9x10-7. We can assume that the [Cl-] from the NaCl overshadows any that may come from the cuprous chloride (even if there was no common ion, [Cl-] would be about 4x10-4 M.) So:
[Cu+][0.35]= 1.9x10-7 and [Cu+] would be about 5.5x10-7 M., which is the molar solubility of CuCl for this problem.