69. Solving a chemistry problem

69. Solving a chemistry problem

2. After dissolution, 100.0 ml of 0.1000 N iodine solution was added to a sample of 1.500 g of technical sodium sulfite. For titration of excess J2, 40.0 ml of a solution was used, 200.0 ml of which contains 2.4820 g of sodium thiosulfate. Determine the % content of Na2SO3 in the sample.

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