UCSB Science Line
Sponge Spicules Nerve Cells Galaxy Abalone Shell Nickel Succinate X-ray Lens Lupine
UCSB Science Line
How it Works
Ask a Question
Search Topics
Our Scientists
Science Links
Contact Information
What is the chemical reaction that makes pop rocks pop?
Question Date: 2009-02-25
Answer 1:

Pop Rocks candy works very similarly to the carbonation in soda pop. The candy has tiny bubbles of pressurized carbon dioxide gas trapped inside. When the candy starts dissolving in the saliva in your mouth (or pretty much any other watery liquid), the gas escapes. So it's not really a chemical reaction as much as a physical release of small amounts of trapped gas. Sometimes you still hear people say that eating Pop Rocks with soda would make your stomach explode, but as they showed on Mythbusters, you'd have to swallow several pounds of Pop Rocks all at once for this to be possible.

Click Here to return to the search form.

University of California, Santa Barbara Materials Research Laboratory National Science Foundation
This program is co-sponsored by the National Science Foundation and UCSB School-University Partnerships
Copyright © 2017 The Regents of the University of California,
All Rights Reserved.
UCSB Terms of Use