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Lab-Expt

Microscale Chemistry in a Plastic Petri Dish: Preparation and Chemical Properties of Chlorine Gas

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Martin M. F. Choi

Department of Chemistry, Hong Kong Baptist University, Hong Kong, SAR, PRC

J. Chem. Educ., 2002, 79 (8), p 992

DOI: 10.1021/ed079p992

Publication Date (Web): August 1, 2002

Abstract

This experiment demonstrates some of the chemistry of chlorine on a microscale, about the size of a water droplet. Chlorine gas was prepared from an acidified bleach solution in a plastic petri dish. The chlorine gas generated in situ reacted with other chemical reagents in the dish by diffusion. Some of the oxidizing properties and bleaching power of chlorine gas were shown visually and could be observed within 10 minutes. These experiments provide suitable hands-on experience for students at secondary-school level.