54. Решение задачи по химии №005 431

A portion of 1.4425 g of sodium nitrite was dissolved in a 250 ml volumetric flask. For titration of 25 ml of KMnO4 solution with T = 0.001520 g/ml, 20 ml of NaNO2 solution was used. What percentage of NaNO2 did the sample contain?

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