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  Home > JCE Print > Journal of Chemical Education > Issues > 2008  > December  >
In the Laboratory
Designing and Conducting a Purification Scheme as an Organic Chemistry Laboratory Practical
Kate J. Graham, Brian J. Johnson, T. Nicholas Jones, Edward J. McIntee, and Chris P. Schaller
Department of Chemistry, College of Saint Benedict / Saint John's University, St. Joseph, MN 56374-2099
Cover
December 2008
Vol. 85 No. 12
p. 1644
Abstract
An open-ended laboratory practical has been developed that challenges students to evaluate when different purification techniques are appropriate. In contrast to most lab practicals, the overall grade includes an evaluation of spectral analysis as well as writing skills. However, a significant portion of the grade lies in successful execution of a purification technique. Most importantly, being able to decide upon the best approach to purification is a crucial component of the exercise.
Supplement
Representative examples of scenarios for the lab practical; Grading rubric
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Contents
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Citation
Graham, Kate J.; Johnson, Brian J.; Jones, T. Nicholas; McIntee, Edward J.; Schaller, Chris P. J. Chem. Educ. 2008, 85, 1644.
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Keywords
First-Year Undergraduate / General; Hands-On Learning / Manipulatives; IR Spectroscopy; Laboratory Instruction; Microscale Lab; Molecular Properties / Structure; NMR Spectroscopy; Organic Chemistry; Physical Properties; Problem Solving / Decision Making; Second-Year Undergraduate; Separation Science; Testing / Assessment
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History
Created:
Last Updated:
10/24/2008
11/7/2008
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Experiments, laboratory exercises, lecture demonstrations, and other descriptions of the use of chemicals, apparatus, instruments, computers, and computer interfaces are presented in the Journal of Chemical Education as illustrative of new or improved ideas or concepts in chemistry instruction and are directed at qualified teachers. Although every effort is made to assure and encourage safe practices and safe use of chemicals, the Journal of Chemical Education cannot assume responsibility for uses made of its published materials. Many chemicals are hazardous. Precautions for the safe use of hazardous chemicals and directions for their proper disposal are described in the Material Safety Data Sheets and on the labels. We strongly urge all those planning to use materials from our pages to make choices and to develop procedures for laboratory and classroom safety in accordance with local needs and situations.
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