Measure ad performance. Select basic ads. Create a personalised ads profile. Select personalised ads. Apply market research to generate audience insights. Measure content performance. Develop and improve products. List of Partners vendors. Share Flipboard Email. Anne Marie Helmenstine, Ph. Chemistry Expert. Helmenstine holds a Ph.
She has taught science courses at the high school, college, and graduate levels. Facebook Facebook Twitter Twitter. Updated January 10, How much cola is left in the bottle? As with the first bottle, remove the cap and place the flat index card on top, covering the hole.
Put on your eye protection and start the video camera. Quickly pull out the flat index card, releasing the crushed Mentos into the bottle, then step back without tipping the bottle over or disturbing the reaction. How high did the eruption appear to go? How much liquid is left in the bottle? Is it more or less than the amount that was left when you used whole candies? If you videotaped the reactions, you can watch your videos now. What do you notice from the videos?
Use a tape measure and blue painter's tape to mark off the height from the top of the bottle in meters. Then repeat this activity three times, with the bottle in front of the tape-marked wall, video taping it each time. When you review the recordings, use slow motion and pause the recording when the spout is at its maximum height. Using the tape marks in the background, estimate the height of the spout. Calculate the average height of the fountains for the whole and for the crushed Mentos.
What is the difference in height of the eruptions? You can try testing different kinds of carbonated beverages, different kinds of candies with different shapes and textures or using other things to start the reaction, like rock salt, pennies or dice.
Which beverages, candies or other things cause the largest and smallest fountains? Why do you think this is? Does temperature affect the eruption height?
Observations and results Was the eruption higher when whole Mentos candies were used compared with crushed candies? Was less Diet Coke left in the bottle after the reaction with the whole candies compared with the crushed ones?
In the Diet Coke bottle the Mentos candy provides a rough surface that allows the bonds between the carbon dioxide gas and water to break more easily, helping to create carbon dioxide bubbles. As the Mentos candy sinks in the bottle, the candy causes the production of more and more carbon dioxide bubbles, and the rising bubbles react with carbon dioxide that is still dissolved in the soda to cause more carbon dioxide to be freed and create even more bubbles, resulting in the eruption.
Dropping Mentos into coke or lemonade allows the dissolved gas within the liquid to come out of the liquid super-fast at these nucleation points on the Mentos surface. Thus the Coke and Mentos reaction is a physical one, not a chemical reaction. Head on over to our blog to find out other cool experiments such as Glowing Fluorescent Liquid or the Super Easy 6 — a free download with 6 super-easy experiments to try at home!
Click here for the perfect slime. You can also check out the award winning science workshops that are coming up in Devon , why not book on? Remember me Login. Lost your password? With this many children watching, its got to be right! Everyone wants a super-high explosion like this one!
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