Na2C2O4 (aq)+ CaCl2 (aq) → CaC2O4 (s) + 2NaCl (aq)
CaC2O4 (s) + H2SO4 (aq) → H2C2O4 (aq) + CaSO4 (aq)
H2C2O4 (aq) + MnO4- (aq) → 2CO2 (g) + H2O (l) + Mn2+ (aq)
Mixtures of CaCl2 and NaCl are used to melt ice on roads. A dissolved 1.9348-g sample of such a mixture was analyzed by using excess Na2C2O4 to precipitate the Ca2+ as CaC2O4. The CaC2O4 was dissolved in sulfuric acid, and the resulting H2C2O4 was titrated with 37.68 mL of 0.1019 M KMnO4 solution.
Calculate the mass percent of CaCl2 in the original sample.
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