1. Calculations Given the following data, determine the % by mass of oxalate (C2O42-) in a sample of an iron oxalate complex with the general formula Kz[Fex(C2O4)y].wH2O.
The reaction between oxalate and permanganate is as follows:
6H+ + 5(COOH)2 + 2MnO4- → 10CO2 + 2Mn2+ + 8H2O
m(iron oxalate complex) used for titration = 0.100 g
C(KMnO4) standard solution = 0.0200 M
M(C2O42-) = 88.02 g mol-1
Titre volume = 10.18 mL
Enter your answer to 3 significant figures.
2. Given the following data, determine the % by mass of Iron (III) (Fe3+) in a sample of an iron oxalate complex with the general formula Kz[Fex(C2O4)y].wH2O.
m(iron oxalate complex) used for stock sample = 0.0100 g
Vtotal (stock sample solution) = 25.00 mL
Valiquot (stock sample solution) = 1.00 mL
Vtotal (diluted sample solution) = 25.00 mL
Cdil(Fe3+) = 1.667 mg L-1 (from calibration curve)
Enter your answer to 3 significant figures.
1. Calculations Given the following data, determine the % by mass of oxalate (C2O42-) in a...