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Making a Chemical Rainbow
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry.
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry.
2010 (English)In: Journal of Chemical Education, ISSN 0021-9584, E-ISSN 1938-1328, Vol. 87, no 5, 504-506 p.Article in journal (Refereed) Published
Abstract [en]

In this laboratory experiment, high school students are challenged to prepare a six-layered chemical "rainbow" in a test tube. Students start with six unknown, colorless liquids and six pigments ranging from violet to red. The experiment is problem based and forces the students to apply their knowledge of solubility and density and combine it with creative and critical thinking to come up with a successful strategy to make the rainbow. This is followed by experimental testing to find the unique solution. Finally, coloring and correct layering of the liquids produces the final and aesthetically pleasing result, a chemical rainbow.

Place, publisher, year, edition, pages
2010. Vol. 87, no 5, 504-506 p.
Keyword [en]
CLIC, Dyes/pigments, First-year undergraduate/general, Hands-on learning/manipulatives, High school/introductory chemistry, Inquiry-based/discovery learning, Laboratory instruction, Liquids, Phases/phase transitions/diagrams, Physical chemistry, Physical properties, Problem solving/decision making, Solutions/solvents
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-19397DOI: 10.1021/ed800171fISI: 000276639900016Scopus ID: 2-s2.0-77955871418OAI: oai:DiVA.org:kth-19397DiVA: diva2:337444
Note
QC 20100525Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2017-12-12Bibliographically approved

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