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2005
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January
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In the Laboratory
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Green Chemistry
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A Greener Approach for Measuring Colligative Properties
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Sean M. McCarthy and Scott W. Gordon-Wylie
Department of Chemistry, University of Vermont, Cook Burlington, VT 05405
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January 2005
Vol. 82 No. 1
p. 116
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| Abstract |
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As a first step towards the greening of instructional laboratories, we present a new greener version of a laboratory procedure designed to measure colligative properties. The greener procedure substitutes the nontoxic, noncarcinogenic compounds stearic, myristic, lauric, and palmitic acids for the less benign aromatic compounds p-dichlorobenzene, benzil, biphenyl, naphthalene, and nitrotoluene. Achieving educational goals without the concomitant generation of chlorinated and aromatic wastes is shown here to be both possible and practical. Furthermore, utilization of the benign fatty acid waste stream for other purposes, such as making soap, wax, or biodiesel, allows this laboratory to approach the zero waste benchmark.
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| Supplement |
Comprehensive instructor notes, a detailed discussion of the freezing behavior of various fatty acid mixtures, examples of typical data obtained and a detailed description of experimental protocols including student calculations and quizzes are available.
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 Contents |
JCE2005p0116W.doc (Microsoft Word)
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| Download |
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| More Information |
Citation |
McCarthy, Sean M.; Gordon-Wylie, Scott W. J. Chem. Educ. 2005 82 116.
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Keywords |
colligative properties*; Fatty Acids; First-Year Undergraduate / General; freezing point depression*; Green Chemistry; green laboratories*; Hands-On Learning / Manipulatives; High School / Introductory Chemistry; Laboratory Instruction; Physical Chemistry; Solutions / Solvents; waste utilization*
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History |
Created:
Last Updated: |
November 29, 2004
December 8, 2004
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| Home > JCE Print > Journal of Chemical Education > Issues >
2005
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January
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116
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