101 Задачка по химии №010 187

72. In a volumetric flask with a capacity of 250.0 ml, a sample of 1.4425 g of technical sodium nitrite is dissolved. For titration of 20.00 ml of this solution, 25.00 ml of KMnO4 solution with a titer of 0.001520 g/ml were used. Determine the percentage of NaNO2 in the sample.

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