Phenolphthalein–Pink Tornado Demonstration

Bruce R. Prall
Department of Chemistry, Marian College, Fond du Lac, WI 54935
Jeannine Eddleton
Department of Chemistry, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061
J. Chem. Educ., 2008, 85 (4), p 527
DOI: 10.1021/ed085p527
Publication Date (Web): April 1, 2008

Abstract

This demonstration uses the vortex generated by a spinning magnetic stir bar to demonstrate Le Châtelier's principle as it applies to the phenolphthalein equilibrium in water and provides an excellent opportunity to discuss limiting and excess reagents.

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History

  • Received: August 03, 2009

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