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Forwards and Backwards: pH and Indicators
Source Institutions
Visitors prepare six solutions combining vinegar and ammonia that range incrementally from acid (all vinegar) to base (all ammonia).
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-932.jpg?itok=0l389QS-)
Bouncy Egg
Source Institutions
In this activity, learners explore how acids can dissolve eggshells leaving behind a membrane-covered bouncy egg.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-000-144.png?itok=1PSLobpQ)
Kool Colors
Source Institutions
Learn about dyes and mordants (fixatives) when you tie-dye fabric with Kool-Aid™ and vinegar. The colored molecules in Kool-Aid™ form a chemical bond between the fiber and dye molecules.