Calcium oxalate (CaC2O4), the main component of kidney stones, is insoluble in water. For this reason it can be used to determine the amount of Ca2+ ions in fluids such as blood. The calcium oxalate isolated from blood is dissolved in acid and titrated against a standardized KMnO4 solution, as shown in Problem 4.95. In one test it is found that the calcium oxalate isolated from a 10.0-mL sample of blood requires 24.2 mL of 9.56 x 1024 M KMnO4 for titration. Calculate the number of milligrams of calcium per milliliter of blood.