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ERIC Number: EJ1442820
Record Type: Journal
Publication Date: 2022-Sep
Pages: 6
Abstractor: As Provided
ISBN: N/A
ISSN: ISSN-0021-9584
EISSN: EISSN-1938-1328
Available Date: N/A
Using RGBY Color Experiments to Demonstrate Redox Reactions in Terms of Hydrogen
Journal of Chemical Education, v99 n9 p3346-3351 2022
Blue (B), yellow (Y), red (R), and green (G) color-changing dye was used in a general chemistry course for first-year undergraduate students with nonscience majors to highlight the redox reactions written as the gain and loss of hydrogen. The first experiment is a vibrant color variation using a synthetic dye of indigo carmine. The second experiment is dyeing using the natural colorant of dry Japanese indigo leaves that have been used to make indigo-colored fabrics with a centuries-old method. The third experiment is a color change achieved using fresh Japanese indigo leaves. The three indigo-based experiments give a clear appearance, an experience regarding a traditional process, and a facile method, respectively. The visual impact and historical process that starts from surrounding natural materials makes a significant impression on students. The course contents were introduced in a lesson within 30 min to empower the teaching of redox reactions by showing oxidized and reduced forms of the indigo dye chromophore. The outcome was that an increasing number of students could explain the definition of oxidation in organic reactions in terms of the gain or loss of hydrogen.
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: eic@jce.acs.org; Web site: http://pubs.acs.org/jchemeduc
Publication Type: Journal Articles; Reports - Research
Education Level: Higher Education; Postsecondary Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Grant or Contract Numbers: N/A
Author Affiliations: N/A