Mentos & Diet Coke – Friday Fun with Frederick and Fleming

Friday Fun - Mentos & Diet Coke

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In our weekly summer segment Friday Fun with Frederick & Fleming, we do different little science experiments that would be fun to do with your kids. The goal with all of these is to use things you could find around the house or pick up at almost any store for a very little amount of money.

In today’s segment, we experimented with a classic, Mentos and Diet Coke. These are simple and fun to do.

Items Needed:

  • Diet Coke
  • Mentos

Instructions:

  1. Open the bottle of Diet Coke (works best with a 2 liter bottle) and place it someplace where spilling pop won’t cause a problem or ruin anything.
  2. Quickly put Mentos into the Diet Coke and stand back.

Science:

Mentos, while they look smooth, have very tiny pits on them.  These little crevices allow the carbon dioxide in the pop to be released.  By quickly releasing the carbon dioxide, the pop quickly is brought to the surface and it flies out of the bottle. You can also use other objects such as rock salt to have the same effect as the rock salt also has tiny pits on it.

Challenge:

Try using one bottle of warm coke and another bottle of cold coke.  Which has a bigger reaction and why?

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