What is the concentration of Ca^2+ (in M) that remains dissolved after addition of .15 mol Ca^2+ and .16 mol C2O4^2- to make a 1.0L aqueous solution? (Ksp= 2.7*10^-9)
In these questions, you treat them like a limiting reagent question, since it is quite obvious that CaC2O4 will precipitate (in the question, but also it has such a small Ksp).
If we precipitate all ...
It finds the concentration of Ca2+ after the reaction.