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A Medical Technology student was given a capsule of a multivitamins and she was asked to determine the % by mass (w/w) of ascorbic acid present in the capsule. The student analyzed the 2.001 g sample using volumetric titration. The following data was generated in the analysis:     KIO3 + 5KI + 6H+ → 3I2 + 6K+ + 3H2O  C6H8O6 + I2 → C6H6O6 + 2I- + 2H+      Table 1. Standardization of KIO3 Molarity of Ascorbic Acid Standard Solution 0.03542 M Volume of Ascorbic Acid 25.00 mL Volume of KIO3 8.70 mL Molarity of KIO3 ______________M   Table 2. Determination of Ascorbic Acid Concnetration Initial burette reading, KIO3 0.00 mL Final burette reading, KIO3 33.60 mL Volume consumed, KIO3 33.60 mL MM of Ascorbic Acid 176.12 g/mole choices     7.30%     30.1%     33.6%     32.5%

A Medical Technology student was given a capsule of a multivitamins and she was asked to determine the % by mass (w/w) of ascorbic acid present in the capsule. The student analyzed the 2.001 g sample using volumetric titration. The following data was generated in the analysis:     KIO3 + 5KI + 6H+ → 3I2 + 6K+ + 3H2O  C6H8O6 + I2 → C6H6O6 + 2I- + 2H+      Table 1. Standardization of KIO3 Molarity of Ascorbic Acid Standard Solution 0.03542 M Volume of Ascorbic Acid 25.00 mL Volume of KIO3 8.70 mL Molarity of KIO3 ______________M   Table 2. Determination of Ascorbic Acid Concnetration Initial burette reading, KIO3 0.00 mL Final burette reading, KIO3 33.60 mL Volume consumed, KIO3 33.60 mL MM of Ascorbic Acid 176.12 g/mole choices     7.30%     30.1%     33.6%     32.5%

Chemistry
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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  1. A Medical Technology student was given a capsule of a multivitamins and she was asked to determine the % by mass (w/w) of ascorbic acid present in the capsule. The student analyzed the 2.001 g sample using volumetric titration. The following data was generated in the analysis:  

     

    KIO3 + 5KI + 6H+ → 3I2 + 6K+ + 3H2O

     C6H8O6 + I2 → C6H6O6 + 2I- + 2H+

     

      

    Table 1. Standardization of KIO3

    Molarity of Ascorbic Acid Standard Solution 0.03542 M
    Volume of Ascorbic Acid 25.00 mL
    Volume of KIO3 8.70 mL
    Molarity of KIO3 ______________M

     

    Table 2. Determination of Ascorbic Acid Concnetration

    Initial burette reading, KIO3 0.00 mL
    Final burette reading, KIO3 33.60 mL
    Volume consumed, KIO3 33.60 mL
    MM of Ascorbic Acid 176.12 g/mole

    choices

       

    7.30%
       

    30.1%
       

    33.6%
       

    32.5%
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