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Have you ever tried the Mentos and Soda Geyser? It’s such a fun classic. We did it years ago with diet Coke. This seems to be the most popular choice of sodas to do the experiment with. But I wanted to do a more colorful version this time. So instead we did a Rainbow Soda and Mentos Geyser!
How to Make a Mentos & Soda Geyser
The Science Behind the Soda Geyser
How does this work?
Soda is carbonated with carbon dioxide or CO2. Mentos candies have a porous outer shell. The little openings in the shell make it the perfect place for all of the bubbles in the soda to rest. The bubbles from the soda form all over the candies, pushing all of the bubbles up to the surface and causing the eruption. Go deeper with the science over at Steve Spangler Science.
Turn it Into a Science Fair Project
You could have a lot of fun turning this into a science fair project by testing which sodas work best! Test several types and brands of soda to see which one shoots the highest.
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