136. Задачка по химии №013 635

9. To establish the concentration of the working solution of complexone III, 1.3250 g of CaCO3 (chemically pure grade) was dissolved in a volumetric flask of 250 cm3. On titration of 25 cm3 of the solution, 26.47 cm3 of complexone III went. Determine its normal concentration and Ca titer.

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