14. Solving a chemistry problem
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14. Solving a chemistry problem
5. By treating 4.500 g of an alloy containing lead, a precipitate of PbCrO4 was isolated. The precipitate was dissolved in acid and an excess of KI was added. 12.50 ml of 0.0912 M sodium thiosulfate solution was used for titration of the released iodine. Calculate the mass fraction of lead in the alloy.
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