Making a Chemical Rainbow

• 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.

Ämnesord

NATURVETENSKAP  -- Kemi (hsv//swe)

NATURAL SCIENCES  -- Chemical Sciences (hsv//eng)

Nyckelord

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

Chemistry

Kemi

Publikations- och innehållstyp

ref (ämneskategori)

art (ämneskategori)