15. Solving a chemistry problem
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15. Solving a chemistry problem
123. To standardize the Na2S2O3 solution, a sample of K2Cr2O7 weighing 0.1410 g was dissolved in dilute HCl, an excess of KI was added, and the released I2 was titrated, using 36.1 cm3 of sodium thiosulfate solution. Calculate the molar concentration of Na2S2O3 equivalent.
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