25. Решение задачки по химии №5

2. To standardize the Na2S2O3 solution, a 0.250 g sample of K2Cr2O7 was dissolved in dilute HCl, an excess of KI was added, and the released I2 was titrated using 48.5 ml of sodium thiosulfate Na2S2O3 solution. Calculate the molar equivalent concentration of this solution.

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