-
x

Meet New Friends!

Recommended friends are based on your interests. Make sure they are up to date.

Friends ff8c072dd79a91c1300f032d674241a8d64367100ffb1f25fa3f9bec4a05319f
Kidzworld Logo

Science Project: Mentos and Diet Coke Geyser

Apr 18, 2011

What’s better than soda, candy and explosions? What about soda, candy and explosions all at the same time? That’s right. This science project may be the most exciting science project you can do and, to add sugar to the sweet, you can find all the materials at the corner store. Amazing!

Although the explosion is simple to achieve there’s quite a bit of interesting science going on in that bottle of cola, which makes this a perfect science fair project. Before we get to the exciting stuff where you get covered in soda, let’s find out what’s happening to make this all so exciting.

The Science:

You may have done a similar experiment where you combine baking soda and vinegar. Maybe you did this in a volcano model? That reaction is a chemical reaction where a new material is formed. This reaction, the Mentos and Diet Coke reaction is a physical reaction, where all the pieces of the reaction remain but are simply rearranged.

The Soda:

The soda is filled with carbon dioxide. That’s what gives the drink all those bubbles and what makes you burp when you drink too much soda. When the bottle is unopened the pressure from the bottle keeps the bubbles in the liquid. When you open a bottle of soda, depending on whether you shook it up beforehand, the bubbles stay in the solution because the surface tension of the liquid traps it in.

The Mentos:

Have you ever seen the surface of a Mentos? Have you ever really seen the surface of a Mentos? Though at first glance a Mentos may seem like it has a smooth surface, there are actually a whole bunch of tiny little dimples covering its surface. All these little dimples provide a place for the carbon dioxide in the soda to latch on and undergo a physical reaction. Scientifically speaking each little dimple on the Mentos is called a nucleation site (impress your science teacher with that one) where the carbon dioxide from the soda can attach and escape the liquid solution (the soda). Because there are so many dimples on the Mentos and because there is so much carbon dioxide in the soda solution the reaction is a big one, which you can’t help but notice when you give this experiment a shot.

Materials:

  • 2 liter bottle of Diet Coke (it’s said that the sugar substitute in Diet Coke kick starts the reaction and gives a bigger geyser)
  • 1 package of Mentos (the original mint flavor, the fruit flavored Mentos are covered in a wax which means there aren’t as many nucleation sites on them)
  • a place where you can get messy (like a picnic table outside or a driveway)

Procedure:

  1. Place the bottle of Diet Coke squarely on a flat surface.
  2. Open the bottle.
  3. Drop the Mentos candies into the bottle.
  4. Stand back and watch the geyser spray!

Experiment With It!

Any scientist will tell you that while it’s fun to blow things up, you always need to make a hypothesis and compare a few things in order to have a successful experiment. What could make this a successful experiment? Well, what about trying different types of soda? Does regular Coke have the same reaction as Diet Coke? Is the geyser taller? What about the candy? Would a Skittle have the same reaction as a Mentos, what about a fruit flavored Mentos?

There are so many different variables you can put into place with this one and who knows, maybe you’ll find a combination that yields an even more amazing eruption!

Have Your Say

What candy-soda combination do you think will yield the tallest geyser? Tell us what you think in the comments section below!

Related Articles:
22 Comments

Related Stories

Micro soda micro
S Chik asks: “I love pop but my parents won’t let me drink it. What should I do?”
Micro rock candy micro
Did you know crystals aren't just for decoration? If you need some science fair project inspirati...
Learn how to make your own homemade sodas with your family - and a little help from the Soda Club...
Poll

How Much Homework Do You Do Each Day?

  • At least a couple of hours.
  • About one to two hours.
  • Less than an hour.
  • Less than half an hour.

General In The Forums

unicornsrule626
I'm board and i want to recreate my list XD It's grown sooo much since last time XD (Once again, this will not be in order XD) 1: Max and Harvey Mills. Ooo and Tilly Mills! 2: Shawn Mendes 3: Shannon Messenger 4:Thomas Sanders 5: Liza Koshy 6: Amelia Gething 7: Percy Jackson! And everyone from PJO, HoO, Kane Chronicles, and Magnus Chase 8: Meghan McCarthy 9: @AnnaOfExquizurd   10: @Zyro   11: @SnowflakeAngelKitten   12: @Mermaid_Author14   13: @ILoveEmojis7   XDDDD 14: @SmartSunnyShadow   15: @Abbergrl   16: ALL THE REST OF MY KW FRIENDS! WAAAY TO MANY TO LIST! 17: Everyone from The Librarians (The show. And i mean the characters, not the cast XD)  18: I know there's more, but that's it for now! 
reply 23 minutes
unicornsrule626
"Mermaid_Author14" wrote: I have so many, but I can't think of them all... Okay, here we go!   @SnowflakeAngelKitten @unicornsrule626 @ILoveEmojis7 @SmartSunnyShadow @AnnaOfExquizurd @Abbergrl All of my KW friends  Harvey Mills (Yeah, sure... Max can tag along) Mitchell Merlin from Welcome to the family! More to be added... "Max can tag along" XDDD CAN I TAG ALONG TOO?!?!!?  AND I'VE ALREADY MET @ILoveEmojis7   XDDD
reply 28 minutes
unicornsrule626
"Abbergrl" wrote: Doing this again cause my 1st post was embarrassing XD 1. @ValenciaRose   2. @genius@23   3. @AnnaOfExquizurd   4. @unicornsrule626   5. @DavidBecker   6. @OwlCityGuy   7. @brilliantstudent   8. Zara Larsson 9. Shawn Mendes 10. All my favourite youtubers! Too many XD 11. Alderpaw (Don't ask) 12. An angel who will tell me exactly how to make annoying people shut their mouths for good XD SHAAAAAAAAAAAAAWN!!!!!
reply 30 minutes
Abbergrl
Abbergrl posted in Say Anything:
"SyedaNida" wrote: 1.  @brilliantstudent  2. Saba Qamar  3. Henry Fischel (the person who invented EXAMS) 4. Poppy  5. Dhinchak Pooja Seriously, Dhinchak Pooja.. she is horrible XD
reply 35 minutes
Ball_Till_I_Fall
September 26
reply about 4 hours