7-A. Ascorbic acid (vitamin C) reacts with 13 according to the equation HO. OH O HO OH Ascorbic acid C6H₂O6 +13+H₂O OH FO +31 + 2H+ OH HO OH Dehydroascorbic acid CHO, Starch is used as an indicator in the reaction. The end point is marked by the appearance of a deep blue starch-iodine complex when the first fraction of a drop of unreacted I remains in the solution. (a) Verify that the structures above have the chemical formulas written beneath them. You must be able to locate every atom in the formula. Use atomic masses from the periodic table on the inside cover of this book to find the formula mass of ascorbic acid. (b) If 29.41 mL of I solution are required to react with 0.197 0 g of pure ascorbic acid, what is the molarity of the I3 solution? (e) A vitamin C tablet containing ascorbic acid plus inert binder was ground to a powder. Then 0.424 2 g was dissolved and titrated by 31.63 mL of I3. Find the weight percent of ascorbic acid in " tablet.

7-A. Ascorbic acid (vitamin C) reacts with 13 according to the equation HO. OH O HO OH Ascorbic acid C6H₂O6 +13+H₂O OH FO +31 + 2H+ OH HO OH Dehydroascorbic acid CHO, Starch is used as an indicator in the reaction. The end point is marked by the appearance of a deep blue starch-iodine complex when the first fraction of a drop of unreacted I remains in the solution. (a) Verify that the structures above have the chemical formulas written beneath them. You must be able to locate every atom in the formula. Use atomic masses from the periodic table on the inside cover of this book to find the formula mass of ascorbic acid. (b) If 29.41 mL of I solution are required to react with 0.197 0 g of pure ascorbic acid, what is the molarity of the I3 solution? (e) A vitamin C tablet containing ascorbic acid plus inert binder was ground to a powder. Then 0.424 2 g was dissolved and titrated by 31.63 mL of I3. Find the weight percent of ascorbic acid in " tablet.

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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