Your Safer Source for Science

Since 1977

Address P.O. Box 219 Batavia, IL 60510
Phone 800-452-1261
Fax 866-452-1436
Email flinn@flinnsci.com
firewatch

The bright red bracts of the poinsettia are not only a wintry pleasure but a great option to use as a natural indicator. In this activity, students extract the pigment from the poinsettia and use it as an indicator to identify the pH of unknowns.

Concepts

  • Acids & Bases
  • pH
  • Indicators