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  Home > JCE Print > Journal of Chemical Education > Issues > 2002  > July  >
In the Laboratory
Unknown Gases: Student-Designed Experiments in the Introductory Laboratory
John Hanson and Tim Hoyt
Department of Chemistry, The University of Puget Sound, Tacoma, WA 98416-0320
Cover
July 2002
Vol. 79 No. 7
p. 845
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.
Supplement
Additional notes to instructors on the logistics of performing this laboratory are available.
*  Contents JCE2002p0845W.doc (Microsoft Word)
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*  Citation
 Hanson, John; Hoyt, Tim. J. Chem. Educ. 2002 79 845.
*  Keywords
 Gases; General Chemistry; Laboratory Instruction
*  History
 Created:
Last Updated:		 June 17, 2002
March 16, 2005
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