A solution of sodium thiosulfate was standardized by dissolving 0.1906 g KIO3 (214.00 g/mol) in water, adding a large excess of KI, and acidifying with HCI. The liberated iodine required 48.92 mL of the thiosulfate solution to decolorize the blue starch/iodine complex. Calculate the molar concentration of the Na2S2O3. Express your answer with 3 decimal places

A solution of sodium thiosulfate was standardized by dissolving 0.1906 g KIO3 (214.00 g/mol) in water, adding a large excess of KI, and acidifying with HCI. The liberated iodine required 48.92 mL of the thiosulfate solution to decolorize the blue starch/iodine complex. Calculate the molar concentration of the Na2S2O3. Express your answer with 3 decimal places

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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25.00 mL of a solution containing KIO4 is treated with excess potassium iodide. IO4- + 8H+ + 7I- → 4I2 + 4H2O The resulting solution is titrated with 0.15 M sodium thiosulfate pentahydrate. The average titre was 21.76 mL. I2 + 2S2O32- → 2I- + S4O62- What mass of KIO4 (in g) was dissolved in water to make the original solution?
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