Oxalic acid is a poisonous compound present in many plants and vegetables, including spinach. Calcium oxalate is only slightly soluble in water (Ksp = 3.0x10-9 at 25oC) and its ingestion can result in kidney stones.
Calculate the solubility of calcium oxalate in plain water and the concentrations of calcium and oxalate ions in a 0.010 M Ca(NO3)2 solution