106. Solving a chemistry problem
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106. Solving a chemistry problem
A weighed portion of a sample containing copper (II), weighing 3.1012 g. dissolved in a volumetric flask with a volume of 100.0 ml. An aliquot of the resulting solution with a volume of 10.00 ml. treated with an excess of potassium iodide, and the released iodine was titrated with 9.85 ml. 0.05000 mol/l sodium thiosulfate solution. Calculate the mass fraction of copper (II) in the sample in%.
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