Talk to a Flinn Scientist or Customer Service Rep1-800-452-1261M-F 7:30am-5pm CT

Organic Rainbow - Chemical Demonstration Kit

Organic Rainbow -
Chemical Demonstration Kit, AP6433
Catalog Number
Organic Rainbow - Chemical Demonstration Kit
Product Description

By: Penney Sconzo
Westminster Academy, Atlanta, GA

Add a clear liquid to a red solution and watch as the colors of the rainbow appear in sequence. But wait, there's more! After a few seconds, the colors of the solution mysteriously reverse directions-switching from violet to blue, green, yellow, orange and finally back to red. Add more clear liquid and the color cycle repeats. This demonstration uses universal indicator to vividly display the hydrolysis reaction of tert-butyl chloride. The hydrolysis reaction produces acid that is slowly consumed by the clear base solution-gradually increasing the pH to display the rainbow colors of universal indicator. Once the base is fully depleted, acid concentration builds up again, thereby reversing the color change back to red. A detailed worksheet is provided for students to record their observations and form conclusions about the reaction they are viewing. Teacher Demonstration Notes included. Enough materials are included to perform the demonstration seven times.
Concepts: Organic chemistry, hydrolysis, indicators.
Time Required: 15 minutes
Materials Provided: Acetone, tert-butyl chloride, universal indicator, sodium hydroxide solution, Beral-type pipets.
Note: A 500-mL graduated cylinder or hydrometer cylinder is required and available separately.


Hydrometer Cylinder, Glass
Two cylinders are available. AP8599 is a borosilicate glass cylinder with pour spout, 600 mL capacity. 37.5 cm high x 5 cm wide. AP6752 is made of clear PMP plastic and has the same dimensions.
Additional Resources
No Additional Resources at the time.
Flinn Catalog/Reference Manual Page 346
P.O. Box 219, Batavia, IL60510



*Advanced Placement and AP are registered trademarks of the College Board, which was not involved in the production of, and does not endorse, these products.