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In one trial of the standardization of a Na2S2O3 solution, a 10.00 mL volume of 5.0010-3 M KIO3 is pipetted into a 250 mL Erlenmeyer

In one trial of the standardization of a Na2S2O3 solution, a 10.00 mL volume of 5.0010-3 M KIO3 is pipetted into a 250 mL Erlenmeyer flask. The solution is titrated to the endpoint with 15.79 mL of the Na2S2O3 solution. What is the molar concentration of this sodium thiosulfate solution? note answer is not .0189 M

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