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Unknown Gases: Student-Designed Experiments in the Introductory Laboratory
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Department of Chemistry, The University of Puget Sound, Tacoma, WA 98416-0320
J. Chem. Educ., 2002, 79 (7), p 845
DOI: 10.1021/ed079p845
Publication Date (Web): July 1, 2002
Abstract
Introductory students design and carry-out experimental procedures to determine the identity of three unknown gases from a list of eight possibilities: air, nitrogen, oxygen, argon, carbon dioxide, helium, methane, and hydrogen. Although this is initially a challenging problem, the students need only a basic understanding of gas properties and reactivity in order to successfully design experiments to identify their gases. Students are excited and motivated by the opportunity to come up with their own experimental approach to solving a chemical problem and feel a strong sense of accomplishment when they succeed.
Keywords (Audience):
First-Year Undergraduate / GeneralKeywords (Domain):
Laboratory InstructionKeywords (Pedagogy):
Hands-On Learning / ManipulativesKeywords (Subject):
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- Received: August 03, 2009
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