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Coke and Mentos Experiment
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Coke/Pepsi and Mentos Experiment!
Introduction
Experiment
Everyone knows that if you drop Mentos into Diet Coke, it will cause a reaction that will create a geyser that will explode. But have you ever wondered the science behind it. In my presentation you will learn what causes the reaction, if crushed Mentos have a better result and who discovered the reaction.
Due to safety hazards, there will be no live presentation. Sorry for any inconvenience :(
Conclusion
In conclusion, the science behind one of the most fun science experiments is simple. Ingredients in the Diet Coke and Mentos create nucleation, which causes the geyser to explode. Thank you!
What causes the reaction?
Who Discovered the Reaction?
The potassium benzoate, aspartame, and CO2 gas in the Diet Coke, combines with the gelatin and gum arabic ingredients of the Mentos, which create the foam.
The structure of the Mentos is the main cause of the eruption due to nucleation. MythBusters found that when fruit-flavored Mentos that have a smooth waxy coating were tested and there was hardly any reaction. The mint-flavored Mentos (with no coating) added to carbonated drink formed an energetic eruption, supporting the nucleation theory. According to MythBusters, the surface of the mint Mentos is covered with many small holes that increase the surface area available for reaction (and thus the quantity of reagents exposed to each other at any given time), thereby allowing CO2 bubbles to form with the rapidity and quantity necessary for the geyser.
Crushed VS Solid Mentos
The first specific references to Coke & Mentos are thanks to Lee Marek, a chemistry professor at the University of Illinois at Chicago. Marek’s students demonstrated Diet Coke & Mentos geysers on the Late Show with David Letterman in 1999. The demonstration used simple nozzles to make tall geysers and explained that the geysers were caused by nucleation.
Mythbusters proved that crushed Mentos do not increase the size of the geyser. The geyser would be slightly less or about equal to solid Mentos.