111. Solving a chemistry problem
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111. Solving a chemistry problem
Calculate the sample to prepare 200 ml of lead ion standard solution. 0.0005 mg of lead ion in 1 ml of the solution gives, by reaction with the reagent, when observed in a layer with a thickness of 6 to 8 cm, a noticeable brownish coloration. Mm. salt 379.33. Mm. lead ion 207.20.
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