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ERIC Number: EJ1032472
Record Type: Journal
Publication Date: 2014-Jun
Pages: 3
Abstractor: As Provided
ISSN: ISSN-0021-9584
EISSN: EISSN-1938-1328
Microwave Mapping Demonstration Using the Thermochromic Cobalt Chloride Equilibrium
Vu D. Nguyen; Kurt R. Birdwhistell
Journal of Chemical Education, v91 n6 p880-882 Jun 2014
An update to the thermochromic cobalt(II) chloride equilibrium demonstration is described. Filter paper that has been saturated with aqueous cobalt(II) chloride is heated for seconds in a microwave oven, producing a color change. The resulting pink and blue map is used to colorfully demonstrate Le Châtelier's principle and to illuminate the hot spots in the microwave oven. The demonstration is a quick, easy, and colorful way to introduce Le Châtelier's principle to students in high school or general chemistry courses.
Division of Chemical Education, Inc and ACS Publications Division of the American Chemical Society. 1155 Sixteenth Street NW, Washington, DC 20036. Tel: 800-227-5558; Tel: 202-872-4600; e-mail:; Web site:
Publication Type: Journal Articles; Reports - Descriptive
Education Level: High Schools; Secondary Education; Higher Education; Postsecondary Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Grant or Contract Numbers: N/A