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The Chemical Educator
ISSN: 1430-4171 (electronic version)
Abstract Volume 11
Issue 6 (2006) pp 408-409
The Determination of Carbon Dioxide in Exhaled Air: A Calculator-Based Laboratory Experiment
James Gordon* and Nathaniel Barbe
Division of Science and Mathematics, Central Methodist
University, Fayette, MO 65248, jgordon@centralmethodist.edu
Received June 25, 2006. Accepted October 9, 2006.
Published online: 1 December 2006
Abstract. A detection method using current technology was applied to a classic experiment in which gaseous carbon dioxide from exhaled air was collected in a flask and ultimately reacted with aqueous sodium hydroxide. A gas pressure sensor interfaced to a calculator-based data collection system was used to determine the percent of carbon dioxide in exhaled air. The average percent of carbon dioxide was found to be approximately 5 %.
Key Words: Laboratories and Demonstrations; general chemistry; introductory/high school chemistry; gases; calculator-based learning
(*) Corresponding author. (E-mail: jgordon@centralmethodist.edu)
Article in PDF format (102 KB) HTML format
Supporting Materials:
The student handout and a sample Excel spreadsheet are included in a Zip file as supporting material (126 KB).
Issue date: December
1, 2006
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