general chemistry II

Copper (II) oxalate (CuC2O4) is a sparingly soluble salt with Ksp=4.43×10−10. Cupric ions (Cu2+) form a complex with excess oxalate ions in solution according to the following equation:

Cu2+(aq)+2C2O2−4(aq)⇌[Cu(C2O4)2]2−(aq)

The Kf for this reaction is 1.7×1010. What is the molar solubility of CuC2O4 in a 0.10 M Na2C2O4 solution