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2003
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In the Laboratory
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Sailing on the "C": A Vitamin Titration with a Twist
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S. Sowa and A. E. Kondo
Department of Chemistry, Indiana University of Pennsylvania, Indiana, PA 15705
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May 2003
Vol. 80 No. 5
p. 550
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| Abstract |
The experiment takes the traditional redox titration of vitamin C using iodine with starch as an indicator, and presents it to the student as a challenge in guided-inquiry format. Two versions, with different levels of difficulty, are provided, to accommodate students with varying levels of problem-solving skills. The "challenge" is both quantitative and qualitative: if you were an eighteenth-century sea captain packing for a voyage to the New World, would you take oranges, lemons, limes, or grapefruits to prevent your crew from getting scurvy? The challenge ties in history, nutrition, and health with chemistry, and provides students an opportunity to work with familiar food products in the laboratory.
See Letter re: this article.
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| Supplement |
Notes for the instructor, detailed background information, and two levels of instructions for students are available.
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 Contents |
JCE2003p0550W.doc (Microsoft Word)
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| Download |
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| More Information |
Citation |
Sowa, S.; Kondo, A. E. J. Chem. Educ. 2003 80 550.
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Keywords |
Inquiry-Based / Discovery Method; Laboratory Instruction; Problem-Based Learning; Titration / Titrimetry
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History |
Created:
Last Updated: |
March 28, 2003
February 28, 2005
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Link to Letter added (April 2004). Link to Featured Molecules added (April 2004).
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| Home > JCE Print > Journal of Chemical Education > Issues >
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May
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550
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