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Generating Water-Soluble Noxious Gases: An Overhead Projector Demonstration
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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.
Keywords (Audience):
High School / Introductory ChemistryKeywords (Domain):
Environmental ChemistryKeywords (Feature):
Overhead Projector DemonstrationsKeywords (Subject):
GasesCiting Articles
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This article has been cited by 3 ACS Journal articles (3 most recent appear below).
A Demonstration of Acid Rain and Lake Acidification: Wet Deposition of Sulfur Dioxide
Lisa M. GossJournal of Chemical Education2003 80 (1), 39A Demonstration of Acid Rain and Lake Acidification: Wet Deposition of Sulfur Dioxide
Lisa M. GossJournal of Chemical Education2003 80 (1), 39A demonstration showing acid rain and lake acidification is described. In this demonstration, SO2 gas is generated in a large graduated cylinder and then dissolved in water droplets from a simple spray bottle. The droplets carry the acid into simulated ...
Solid NaHSO3 Does Not Exist
David TudelaJournal of Chemical Education2000 77 (7), 830Solid NaHSO3 Does Not Exist
David TudelaJournal of Chemical Education2000 77 (7), 830Solid NaHSO3 Does Not Exist by David TudelaRe: article by S. Solomon et al.
Correction
Bruce D. BeaverJournal of Chemical Education2000 77 (7), 830Correction
Bruce D. BeaverJournal of Chemical Education2000 77 (7), 830Word error in original article.
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History
- Received: August 03, 2009
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