35. Solving a chemistry problem
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35. Solving a chemistry problem
Lead was precipitated from 3.20257 g of the alloy in the form of PbCrO4. By the action of acid and KI on the precipitate, I2 was isolated, for the titration of which 9.15 ml of 0.1028 M Na2S2O3 were used. Calculate the mass fraction of Pb in the alloy.
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