The concentration of standardized EDTA is determined by titration of 25.0 mL of 0.100 M CaCl2 solution by 35.0 mL EDTA.
Scandium is determined by titration of Sc3+ with the standard EDTA.
Sc3+ + H2Y2− → ScY− + 2H+
A 1.00-g sample is titrated by 35.0 mL EDTA.
Calculate the percent Sc2O3 in the sample.
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