58. Solving a chemistry problem

58. Solving a chemistry problem

100. To analyze a mixture containing impurities of antimony, lead and indium, a sample of 0.3824 g was dissolved in acid and the volume was brought to 100 ml with water. During polarography of 25 ml of the obtained solution against the background of 2 M hydrochloric acid, the impurity wave heights were 48 mm for antimony, 62 for lead, and 36 mm for indium. When polarography of 25 ml of a standard hydrochloric acid solution containing 0.0001 M of the listed metals, the wave heights were equal to 57, 32, 45 mm, respectively. Determine in % the content of metals - impurities in the mixture.

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