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ERIC Number: EJ920077
Record Type: Journal
Publication Date: 2010-Sep
Pages: 3
Abstractor: As Provided
Reference Count: 25
ISSN: ISSN-0021-9584
Clock Reaction: Outreach Attraction
Carpenter, Yuen-ying; Phillips, Heather A.; Jakubinek, Michael B.
Journal of Chemical Education, v87 n9 p945-947 Sep 2010
Chemistry students are often introduced to the concept of reaction rates through demonstrations or laboratory activities involving the well-known iodine clock reaction. For example, a laboratory experiment involving thiosulfate as an iodine scavenger is part of the first-year general chemistry laboratory curriculum at Dalhousie University. With the necessary materials, expertise, and laboratory space readily available, this undergraduate clock reaction experiment was modified to make it accessible to grade 9 students. The revised, qualitative experiment has been performed as an on-campus outreach initiative with eight grade 9 classes, reaching a total of 250 students, teachers, parents, and aides. The activity was facilitated by graduate student volunteers, who assisted the grade 9 students as they were exposed to a colorful adventure involving kinetics, chemical reactions, and catalysis. In general, adapting undergraduate experiments offers researchers and educators a positive and efficient way to introduce younger students to a university chemistry laboratory. (Contains 1 table.)
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: Grade 9; High Schools; Higher Education; Postsecondary Education; Secondary Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers - Location: Canada