If 1.000ml of a solution of KMnO4 is equivalent to 0.1000mmol of sodium formate (HCO2Na) in the following titration: 2HCO2 - + 2MnO4 - + H2O → 3CO2 + 2MnO2 + 5OH- , what is the value of the KMnO4 in terms of grams of CaO in the volumetric method for calcium in which that element is precipitated as CaC2O4•H2O, the precipitate filtered and dissolved in dilute H2SO4, and the oxalate titrated with permanganate

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