45. Solving a chemistry problem
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511. 30.00 ml of solution I2 was added to a solution of sodium sulfite. For titration of residue I2, 21.00 ml of 0.1200 M sodium thiosulfate solution were used. Calculate the mass of Na2SO3 in the analyzed solution if it is known that 1.000 ml of I2 solution is equivalent to 1.050 ml of Na2S2O3 solution.
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