29. Решение задачи по химии №002 972

2. When analyzing a 0.2505 g sample of dolomite, a precipitate of calcium oxalate CaC2O4 was isolated, for the titration of which (after its dissolution in sulfuric acid went) 20.1 ml of a KMnO4 solution, with a titer for iron of 0.0120 g / ml. Determine the mass fraction of CaCO3 in dolomite.

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