Based on the following two reaction equations, calculate the molarity of an unknown ascorbic acid if titrating 15 mL of this unknown solution consumes 15.67 mL of 0.01235 M of KIO3 solution to reach the end point. [1] KIO3 + 5KI + 6H+ → 3I2 + 6K+ + 3H2O [2] C6H8O6 + I2 → C6H6O6 + 2I- + 2H+

Based on the following two reaction equations, calculate the molarity of an unknown ascorbic acid if titrating 15 mL of this unknown solution consumes 15.67 mL of 0.01235 M of KIO3 solution to reach the end point. [1] KIO3 + 5KI + 6H+ → 3I2 + 6K+ + 3H2O [2] C6H8O6 + I2 → C6H6O6 + 2I- + 2H+

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter10: Fuels, Organic Chemicals, And Polymers

Section: Chapter Questions

Problem 115QRT

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Question

6. Based on the following two reaction equations, calculate the molarity of an unknown ascorbic acid if titrating 15 mL of this unknown solution consumes 15.67 mL of 0.01235 M of KIO₃ solution to reach the end point.

[1] KIO₃ + 5KI + 6H⁺ → 3I₂ + 6K⁺ + 3H₂O

[2] C₆H₈O₆ + I₂ → C₆H₆O₆ + 2I^- + 2H⁺

Hint: each KIO₃ produces 3 molecules of I₂, and each I₂ molecule will consume one molecule of ascorbic acid C₆H₈O₆

Group of answer choices

A, 0.0387

B, 0.387

C, 0.0129

D, 0.129

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