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| Home > JCE Print > Journal of Chemical Education > Issues >
1999
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December
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Chemistry Everyday for Everyone
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The Bridge of Mandolin County
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Juliette M. Lantz
Department of Chemistry, Drew University, Madison, NJ 07940
Jenny E. Feindt, Eric P. B. Lewellyn, and Mary M. Walczak
Department of Chemistry, St. Olaf College, Northfield, MN 55057
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December 1999
Vol. 76 No. 12
p. 1671
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| Abstract |
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The Bridge of Mandolin County is a case designed to teach the general chemistry principles of molar mass, ions and aqueous reactions, solubility rules, and inorganic nomenclature. Through the instructor-facilitated class discussion, students consider the options before the Mandolin Town Council regarding deicing the newly constructed bridge connecting Mandolin with a large nearby city. The students must decipher contradictory claims made on behalf of sodium chloride, the traditional deicer, and calcium magnesium acetate, a new environmentally friendly deicer, to arrive at the most cost-effective and environmentally appropriate deicing product. As they work through the analysis they raise questions that can be addressed in a laboratory setting. Four optional role-playing experiments are included, which can be used by the students to gather information helpful to resolution of the case. The case is intended to be used over two class periods, with a laboratory period in between, though suggestions for other models are provided. Laboratory procedures include an EDTA titration for Ca2+ and Mg2+, a gravimetric analysis, a qualitative examination of ions and solubility, an introduction to freezing point depression and measurement, and an experimental design activity. This case can also successfully be used without alteration in non-majors chemistry or environmental chemistry courses, or upper-level analytical or environmental chemistry courses.
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| Supplement |
Case notes, laboratory experiments, and teaching notes are provided.
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| More Information |
Citation |
Lantz, Juliette M.; Feindt, Jenny E.; Lewellyn, Eric P. B.; Walczak, Mary M. J. Chem. Educ. 1999 76 1671.
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Keywords |
Environmental Chemistry; Problem-Based Learning; Collaborative / Cooperative Learning; Public Understanding; Consumer Chemistry; Introductory / High School Chemistry
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History |
Created:
Last Updated: |
November 10, 1999
November 22, 2005
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| Home > JCE Print > Journal of Chemical Education > Issues >
1999
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December
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1671
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