P.O. Box 219 Batavia, IL 60510

Phone 800-452-1261
Fax 866-452-1436

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Mix two colorless solutions and watch as, after a few seconds, they suddenly change from colorless to a dramatic deep-blue color! Captivate your students’ attention with this popular starch–iodine clock reaction while studying the effects of concentration, temperature, and a catalyst on the rate of reaction.