8. Determine the mass fraction of (NH4)2C2O4*H2O in the analyzed sample, if after dissolving its sample weighing 0.2265 g, 25.00 ml of 0.1000 M CaCl2 solution was added to the resulting solution. and the excess calcium salt was titrated with 18.50 ml of EDTA solution with a calcium titer of 0.002004 g/ml.

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