The ascorbic acid, C6H806 (176.124 g/mmol) content of a bottle of peach juice containing 2.50 L was determined by titration with a standard solution of potassium iodate, KIO3. The KIO3 solution was prepared by dissolving 100.4 mg primary standard grade KIO3 (214.001 mg/mmol) to a final volume of 250.0 mL. To a 200.00-mL aliquot of the sample, 10 mL of KI, 10 mL of HCI and 5 mL of starch solution were added and subsequently titrated, requiring 18.19 mL of the KIO3 titrant. The relevant reactions are given below: KIO3 + 5KI + 6H*→ 312 + 6K+ + 3H₂O C6H8O6 + 12 C6H6O6 +21+ 2H+

The ascorbic acid, C6H806 (176.124 g/mmol) content of a bottle of peach juice containing 2.50 L was determined by titration with a standard solution of potassium iodate, KIO3. The KIO3 solution was prepared by dissolving 100.4 mg primary standard grade KIO3 (214.001 mg/mmol) to a final volume of 250.0 mL. To a 200.00-mL aliquot of the sample, 10 mL of KI, 10 mL of HCI and 5 mL of starch solution were added and subsequently titrated, requiring 18.19 mL of the KIO3 titrant. The relevant reactions are given below: KIO3 + 5KI + 6H*→ 312 + 6K+ + 3H₂O C6H8O6 + 12 C6H6O6 +21+ 2H+

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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Solutions

Solutions can be considered as homogeneous mixtures which contain two or more than two chemical substances. The chemical substance which is the greater part is defined as solvent. And the chemical substance that is dissolved in a solvent is referred to as solute. Solution chemistry plays an important role in chemistry since it supports many commercial applications of solutions.

Question

chemhelp3

The ascorbic acid, C6H806 (176.124 g/mmol) content of a bottle of peach juice containing 2.50 L was
determined by titration with a standard solution of potassium iodate, KIO3. The KIO3 solution was
prepared by dissolving 100.4 mg primary standard grade KIO3 (214.001 mg/mmol) to a final volume of
250.0 mL. To a 200.00-mL aliquot of the sample, 10 mL of KI, 10 mL of HCI and 5 mL of starch solution
were added and subsequently titrated, requiring 18.19 mL of the KIO3 titrant. The relevant reactions are
given below:
KIO3 + 5KI + 6H*→ 312 + 6K+ + 3H₂O
C6H8O6 + 12 C6H606+21+ 2H+
1. What is the molarity of the KIO3 solution?
a. 0.005701 M
b.
0.002346 M
C.
0.001877 M
d. 0.004692 M
2. How many millimoles of ascorbic acid is in the titrated sample?
a.
0.1280 mmol
b. 0.1024 mmol
C.
0.2560 mmol
d.
0.1126 mmol
3. What is the mass of ascorbic acid per bottle of the peach juice?
a.
273.9 mg
b.
200.4 mg
C.
225.5 mg
d. 250.5 mg

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