I DON’T HAVE ANY. YEAH, YOU’RE IN FOR A TREAT HERE. OKAY. ALL RIGHT, SO WE CALL THIS EXPERIMENT THE ELEPHANT TOOTHPASTE. OKAY. SURPRISING REACTIONS CAN HAPPEN WHEN WE MIX SUBSTANCES TOGETHER.

The elephant's toothpaste experiment shows how a catalyst can speed up the rate of a reaction. Hydrogen peroxide breaks down slowly into water and oxygen. Adding a catalyst such as sodium iodide ...