111. Задачка по химии №011 191

45. PbCrO4 was precipitated from 25.00 cm3 of a lead (II) salt solution, filtered, washed, dissolved in acid, and an excess of KJ was added. 31.50 cm3 of 0.1010 N Na2S2O3 was used for titration of the released iodine. Calculate the lead content (r) in the solution?

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