514. To an aliquot of sodium sulfite with a volume of 10 ml was added 15.0 ml of 0.02545 mol / l solution of iodine (I) chloride after the end of the reaction, an excess of potassium iodide. 6.35 ml of 0.04625 mol/l sodium thiosulfate solution was used for titration of the released iodine in the presence of starch. Calculate the mass of sodium sulfite in 250.0 ml of the analyzed solution.

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