Ascorbic acid (MW = 176.12 g/mole) is readily oxidized by molecular iodine in the presence of acid as shown in the reaction below: %3D CH2OH CH2OH снон снон H+ + 2 HI но он Once all of the ascorbic acid has reacted with the iodine, any excess iodine will react with a starch indicator to make a purple color, indicating the endpoint. This experiment will use an ascorbic acid solution of known concentration to determine the concentration of iodine. Once that concentration is known, it will be necessary to use that solution to determine the Vitamin C content of a commercial sample, such as orange or apple juice.

Ascorbic acid (MW = 176.12 g/mole) is readily oxidized by molecular iodine in the presence of acid as shown in the reaction below: %3D CH2OH CH2OH снон снон H+ + 2 HI но он Once all of the ascorbic acid has reacted with the iodine, any excess iodine will react with a starch indicator to make a purple color, indicating the endpoint. This experiment will use an ascorbic acid solution of known concentration to determine the concentration of iodine. Once that concentration is known, it will be necessary to use that solution to determine the Vitamin C content of a commercial sample, such as orange or apple juice.

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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12. Bicine is an organic compound used as a buffering agent. It is one of Good's buffers and has a pKa of 8.354 at 25 °C. The molecular formula of bicine is C6H13NO4. Bicine can react with Ba(OH)2 according to the following reaction. 2 C6H13NO4 + Ba(OH)2 → Ba(C6H12NO4)2 + 2 H₂O It took a student worker 3 steps to make a buffer solution. First, a bicine solution is made by dissolving 37.47 grams bicine in enough water. The total volume is 200.00 mL. Then 250.00 mL Ba(OH)2 solution is prepared by adding 36.57 grams Ba(OH)2 solid and enough water. At the end, a buffer solution is made by mixing 157.89 mL of the above bicine solution and 89.32 mL of the above Ba(OH)2 solution. A. B. C. Determine the equilibrium concentration of bicine in the buffer solution. Please provider your answer below. A of Ba(C6H12NO4)2 in the buffer solution. Check answer Determine the equilibrium concentration M Please provider your answer below. A pH = Please provider your answer below. A $ Check answer…
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