Chameleon Emulsion

CCA! Volume 5

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Chameleon Emulsion

Toluene (with Rhodamine B dye) is shaken with saturated aqueous (NH₄)₂SO₄.


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Voiceover
A cylinder contains two colorless, immiscible layers. The top layer is toluene containing the colorless form of Rhodamine B dye. The bottom layer is saturated aqueous ammonium sulfate. Upon shaking, a red color is produced in the emulsion layer. As the emulsion breaks up the red color disappears. At the interface, the red quinonemethide is produced.

Discussion
On shaking, the resulting tiny water droplets are all surrounded by the red form of the dye.

Citation:
	Kolb, K. E.	Bradley University, unpublished results.

Design, Text and Demonstrator:
	Gary Trammell	University of Illinois at Springfield, Springfield, IL 62794

Videographer/Editor:
	Steve Dykema	University of Illinois at Springfield, Springfield, IL 62794

Voice:
	Margaret Biddle	University of Wisconsin - Madison, Madison, WI 53706

Audio Production:
	Greg Minix	University of Wisconsin - Madison, College of Engineering, Madison, WI 53706
	Jerrold J. Jacobsen	University of Wisconsin - Madison, Madison, WI 53706