122. Задачка по химии №012 282

Calculate the percentage of copper in the ore, if copper was transferred from a sample of 0.6215 g of ore to a solution in the form of Cu2, when KI was added to this solution, I2 was released, for the titration of which 18.23 ml of Na2S2O3 solution was used (TNa2S2O3/Cu = 0.006208).

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