The faint pink murexide indicator end point which only

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A sample of a mixture of CaC2O4 and MgC2O4 was dissolved in about 100 mL of aqueous acid. One half of the solution was titrated with 15.05 mL of 0.1000 M KMnO4 to the end point.

MnO4 + C2O4 = Mn + CO2 (unbalanced)

The other half of the solution was titrated with 27.40 mL of 0.1000 M EDTA to the faint pink murexide indicator end point which only titrates the calcium ions. Calculate the mass percentage of the original sample that was CaC2O4.

Reference no: EM13345009

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