The task of analytical chemistry 42

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Calculate the normality of iodine solution if the titration 0,2040 g As2O3 purity of the primary standard (mol. weight 197,8) took 37,34 ml of this solution. During the titration proceeds, the reaction I2 + H2AsO3(-) + H2O = 2I(-) + H2ASO4(-) + 2H(+)

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