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

Pink swirls appear as ammonia gas diffuses across a filter-paper membrane into phenolphthalein solution. Molecules in motion!

Concepts

  • Scientific Method
  • Diffusion
  • Gases
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