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| Address | P.O. Box 219 Batavia, IL 60510 |
| Phone | 800-452-1261 |
| Fax | |
| flinn@flinnsci.com |
DC11062
Price: FREE
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.
