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  Home > JCE Print > Journal of Chemical Education > Issues > 1998  > December  >
In the Classroom
Overhead Projector Demonstrations
Generating Water-Soluble Noxious Gases: An Overhead Projector Demonstration
Sally Solomon, Maria Oliver-Hoyo, and Chinhyu Hur
Drexel University, Department of Chemistry, Philadelphia, PA 19104
Cover
December 1998
Vol. 75 No. 12
p. 1581
Abstract
A simple, inexpensive apparatus to generate and collect water-soluble noxious gases as an overhead projector demonstration can be made from two small beakers and a Petri dish. The detection and generation of sulfur dioxide and nitrogen dioxide are described. Sulfur dioxide dissolved in water is detected using an acid-base indicator, decolorizing of anthocyanin, or reduction of permanganate. The SO2 is generated by addition of sulfite or bisulfite to a strong acid or by the addition of concentrated sulfuric acid to sugars. Nitrogen dioxide is generated by mixing copper and nitric acid and detected using an acid-base indicator.

See Letter re: this article.

Featured on the Cover
More Information
*  Citation
 Solomon, Sally; Oliver-Hoyo, Maria; Hur, Chinhyu. J. Chem. Educ. 1998 75 1581.
*  Keywords
 Gases; Environmental Chemistry; Redox Reactions; Carbohydrates; Demonstrations; Teaching / Learning Aids
*  History
 Created:
Last Updated:		 June 18, 1999
June 24, 2005
Link to Letter added (April 2004). Link to Cover added (April 2004).
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