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| Home > JCE Print > Journal of Chemical Education > Issues >
2003
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January
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In the Laboratory
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The Analysis of Seawater: A Laboratory-Centered Learning Project in General Chemistry
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Jodye I. Selco, Julian L. Roberts, Jr., and Daniel B. Wacks
Chemistry Department, University of Redlands, Redlands, CA 92373
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January 2003
Vol. 80 No. 1
p. 54
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| Abstract |
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A laboratory-centered learning project for general chemistry on the analysis
of seawater is described. Each laboratory section of 16–20 students is divided
into teams of four students; each student works for three weeks on the project.
Aggregation of all the class data gives the proximate total analysis (>99%) of
the major ionic constituents of seawater. The experimental design includes both
qualitative analysis for cations and anions and the quantitative analysis of four
cations (Na+, K+, Mg2+, Ca2+) and
three anions (Cl-, SO42-, Br-)
by a variety of gravimetric, volumetric, and instrumental methods. During the
three-week project each group writes two draft reports and a final report that
summarizes the group's and class's experimental work. Each group member receives
a grade based on the overall quality of the report as well as their contributions
to the project.
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| Supplement |
Notes for the instructor and detailed instructions for students are available.
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 Contents |
JCE2003p0054W.doc (Microsoft Word)
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| Download |
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| More Information |
Citation |
Selco, Jodye I.; Roberts, Julian L., Jr.; Wacks, Daniel B. J. Chem. Educ. 2003 80 54.
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Keywords |
Analytical Chemistry; Aqueous Solution Chemistry; Collaborative / Cooperative Learning; Environmental Chemistry; Inquiry-Based / Discovery Method; Instrumental Methods; Laboratory Instruction; Problem-Based Learning; Qualitative Analysis; Quantitative Analysis; Water / Water Chemistry; General Chemistry
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History |
Created:
Last Updated: |
December 5, 2002
February 28, 2005
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| Home > JCE Print > Journal of Chemical Education > Issues >
2003
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January
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54
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