136. Задачка по химии №013 615

Calculate the mass fraction of Al2O3 in silicate, if a sample of 1.022 g of it was transferred into a solution, 25.00 cm3 of 0.215 M complexone III was added, and 9.25 cm3 of a 0.1015 M solution of ZnSO4 was used for the titration of the latter.

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