What is the balanced equation for copper (II) sulfate pentahydrate and potassium oxalate monohydrate?

Answer 1

CuSO4 + K2C2O4 ==> CuC2O4 + K2SO4
You can add the water of hydration.

Answer 2

CuSO4.5H2O + 2K2C2O4.H2O --> K2(Cu(C2O4)2).2H2O +K2SO4 + 5H2O

Answer 3

Thanks to Steve I learned a new compound today. I was unaware of the double salt. There is both a dihydrate and a tetrahydrate. The dihdrate is the more stable of the two.