Diet Coke Mentos Experiment

My 4-year old and our neighbor enjoyed witnessing this explosive soda and Minty Mentos experiment. Have you tried it? It doen’t require a huge set-up, and the show is pretty awesome. I have to warn you that the explosion itself goes by quickly, so you might want to have an arsenal of soda containers on hand so you can conduct multiple experiments.

diet coke and mentos explosion

Ingredients for Diet Coke and Mentos Experiment

  • Diet Coke
  • Minty Mentos
Hee hee — pretty obvious, huh?

mentos and diet coke

Take the Mentos out of the wrapper.

mentos and diet coke experiment

Almost as soon as the Mentos hit the soda, the explosion begins, so f you’d like to try dropping more than one into the Soda bottle, make a paper tube and fill it with all your Mentos.

filling mentos into a tube

Take it outside. open the bottle, drop in one (or multiple) Mentos, and then step back!

kids mentos and diet coke

The explosion happened so fast that I was unable to capture it with my camera, so you’ll have to try this experiment for yourself and see how it works.

Experiment ideas

  • Try this with other types of soda. I read that diet soda is recommended because it’s less sticky than regular soda, but regular soda should work too. Compare the results of regular and Diet Coke.
  • The carbonation is what’s supposed to trigger the reaction: try this experiment with carbonated water. What happens?
  • Compare the results of fruit-flavored and mint-flavored Mentos.
  • What happens when you add other ingredients to the soda: salt, rock salt, sugar, baking soda, peanuts.

soda science experiment

The Science Bit

According to Wikipedia, “the numerous small pores on the candy’s surface catalyze the release of carbon dioxide(CO2) gas from the soda, resulting in the rapid expulsion of copious quantities of foam”

Taking this 100 Steps Further…

Eepybird.com (Entertainment for the Curious Mind) shared that  the exploding Diet Coke and Mentos Experiment was first introduced by University of Chicago chemistry professor, Lee Marek. The Eepybirds later recreated this experiment in a spectacular multi-bottle show on David Letterman.

 Your Turn!

So, are you ready to run out and pick up some soda and Mentos? Have you tried this experiment? What did your kids think about it?

Comments

    • rachelle says

      I know, Vicky. I should have set up a video camera or something. My head was down, staring at the Mentos, and I actually had to ask the kids how high the geyser shot. They claimed it was taller than the trees, but I’m not so sure. Maybe. :)

  1. Ashley says

    Saw the guys do this at makerfaire. They said that the warmer the soda the bigger the explosion. So leave it in the warm sun all day, and you’ll get a lovely fountain.

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  1. [...] summer weather it is a great time to get outside and experiment  Get those hoses ready!- Diet Coke and Mentos. A classic and personal favorite  Have students describe each ‘ingredient’ before you [...]