I've been with this problem for a while, really have no idea how I should tackle it:
I've been facing this for a while, no idea how to tackle it:
"The standard laboratory technique for determination of the concentration of calcium in blood serum and urine uses the following reaction sequence involving ammonium oxalate, (NH4)C2O4, and potassium permanganate, KMnO4.
Ca2+ + (NH4)C2O4 = CaC2O4(s) + 2NH4+ (1)
CaC2O4(S) + H2SO4 = H2C2O4 + CaSO4 (2)
KMnO4 + H2C2O4 + H2SO4 = K2SO4 + MnSO4 + CO2 + H2O (3)
A 24 hour urine sample is collected from an adult patient, reduced to a small volume, and titrated with 26.3 mL of 0.0946M KMnO4 solution. How many grams of calcium oxalate are in the sample? Normal range for Ca2+ output for an adult is 100 to 300 mg per 24 hours. Is the sample within normal range?
For the purpose of balancing, the redox reaction (3) can be simplified as follows:
MnO4- + H2C2O4 = Mn2+ + CO2 "
I know it's long, but really, any help here would be greatly appreciated.