What is the independent variable in the Mentos experiment? This makes the cleanup process after the experiment easier, and less gross, as nobody would want to be all covered in sugary goop, especially on a hot summer day! Repeat the same procedure for the bottle of soda at room temperature and then again for the bottle of warm soda. We put 4 mentos pieces into the bottle of diet coke. Repeat the process, varying the opening that the soda erupts from. Warm soda tends to fizz much more than cold soda because of the solubility of gases in liquids. This will happen because the dissolved CO2 will provide the most nucleation sites to come out of the solution. As mentioned earlier in the article, using either diet coke or regular coke alongside mentos can produce a spewing geyser of carbonation bubbles. Better yet, if we could trigger the drop of the Mentos from a distance, we wouldnt get as wet. The experiment became a subject of the television show MythBusters in 2006. Subtract the remaining amount of liquid from the original volume of the bottle to calculate the volume of the geyser. Mentos and Coke Experiment How to Do It! We put 4 mentos pieces into the bottle of diet coke. So aspartame causes the most mass lost. Carbon dioxide is the chemical compound that consists of two oxygen atoms bonded to a carbon atom. No matter which brand of soda you tested, the warm bottle probably produced the highest shooting geyser. ", "MythBusters: Diet Coke and Mentos MiniMyth", "Toying with the Diet Coke and Mentos experiment", "How Many Bubbles Are in the Foam Produced during the Candy-Cola Soda Geyser? You want the candies going in the bottle and not falling over the side. Hypothesis: If the amount of soda in the bottle decreases, then the height of the plume and velocity of the liquid will also decrease because there will less liquid with which the Mentos can react. The variable could be something like the number of mentos dropped into the bottle, the flavor of diet soda, the size of the bottle, or the temperature of the soda. As they say, the rest is history. Mentos and Diet Coke Experiment | Science project - Education We found that the Diet CokeMint Mentos reaction lasted 3.8s, the Diet CokeFruit Mentos reaction lasted 3.6s, and the Diet CokeWint-o-Green reaction lasted 4.9s. Have you ever taken a can of soda, shook it up, and given it to your friend? Each mint has thousands of tiny pits all over its surface. Pepper has the strongest reaction. This easy at-home experiment is a great way to "see" science. Depending upon the number of Mentos dropped into the bottle, the spray height can vary between a few inches and tens of feet. Quantitative Observation My cohost for the KUSA-TV science segment was the lovely Kim Christiansen. He will be performing the crushed vs whole candy in a diet coke. The only variable youll change in this test is the brand of soda; everything else will remain the same. WebPut 5 room temp Mint Mentos in a geyser tube. ), A tube the width of the Mentos. We also examined the reaction between Mint Mentos and Diet Coke, Caffeine Free Diet Coke, Coca-Cola Classic, Caffeine Free Coca-Cola Classic, seltzer water, seltzer water with potassium benzoate added, seltzer water with aspartame added, tonic water, and diet tonic water. American Crystallographic Association, Inc. AVS: Science and Technology of Materials, Interfaces and Processing, www.stevespanglerscience.com/experiment/00000109, Paragliders' launch trajectory is universal, On the bifurcation behavior of a folded notebook page, Rosalind Franklin's X-ray photo of DNA as an undergraduate optical diffraction experiment, Introducing quantum mechanics through its historical roots: The hydrogen Rydberg atom viewed through the lens of the old quantum theory, The discovery of a supermassive black hole at the center of the Milky Way galaxy, Sensory evaluation and electronic tongue analysis for sweetener recognition in coke drinks. Thanks also to Guichuan Hou and Phil Russell for their help in acquiring the SEM images, and to Donovan Leonard for his help in acquiring some of the AFM images. American Journal of Physics 1 June 2008; 76 (6): 551557. Stir up some enthusiasm for experimentation with this candy-cracking science experiment! The images were acquired with a beam energy of 12.5kV and a spot size of 5.0nm. This low temperature allows the maximum amount of carbon dioxide to dissolve into the soda, keeping the carbonation levels as high as possible. 5 Research Drive, Suite 150Shelton, CT 06484. However, a change in surface roughness might also occur and affect the results when the Mentos is crushed. [17] This record was afterward beaten in November 2014 by another event organized by Perfetti Van Melle and Chupa Chups in Len, Guanajuato, Mexico, where 4,334 Mentos and soda fountains were set off simultaneously. WebMentos and Diet Coke Experiment. He would like to know why does the shape and size of the mentos affect the outcome of the project. Although this conclusion seems to refute the claims made by the Mythbusters, remember that in their experiments, Jamie added enough caffeine to kill you to the seltzer water.1 So the relatively small amount of caffeine in a 2l bottle of Coke doesnt significantly affect the reaction. What is the aim of the Coke and Mentos experiment? Does Colorado have a defensive driving course? 2023 Cool Kid Facts. There is not always a direct correlation between the mass lost and the distance traveled for the reactions. But making soda explode is fun. [20] It has also been demonstrated that addition of certain concentrations of alcohol (which lowers surface tension) to carbonated beverages decreases fountain heights. Once the geyser stops, measure how much liquid is left inside. http://www.eepybird.com/featured-video/coke-and-mentos-featured-video/science-of-coke-mentos/, https://www.bravotv.com/top-chef/blogs/diet-coke-takes-longer-for-flight-attendants-to-serve-on-airplanes-bubbles#:~:text=Sugar%20both%20increases%20viscosity%20and,bubbles%20that%20pop%20much%20slower.%22&text=In%20the%20end%2C%20the%20total,out%20by%20a%20few%20seconds. A more dramatic effect is the rate of the reaction. We even played with ways to use the Geyser Tube to trigger multiple soda geysers in a method similar to a Rube Goldberg machine. Use this worksheet to help you record your observations after doing this experiment. Hall, Magdalena Jaramillo, Cully Little, and Zach Russell, and my graduate research assistant, Jon Jones. View the Mentos Geyser Experiment here! Try placing the soda bottle next to the wall of a brick building, after getting permission from the buildings owner, of course. We knew the Mentos Geyser Experiment was a popular experiment when a producer from ABCs Who Wants to Be a Millionaire called for help when writing a question. Enough mass was deposited by the Hawaiian hot spot to form the islands, but the eruptions were comparatively gentle.) The basic science of the Coke and Mentos reaction is fairly straightforward. ), Vampire Slime Light Sensitive Color-Changing, STEM Science Kit: Amazing Scientist Chemistry Kit, Big Bucket of Science Test Tube Experiments, A roll or box of Mentos chewy mints (stick with the standard mint flavor for now), 2-liter bottle of diet soda (either diet or regular soda will work for this experiment, but diet soda is not sticky when youre cleaning it up, and it will usually create a bigger blast). Be ready. The classic baking soda and vinegar acid-base reaction produces unstable carbonic acid that rapidly decomposes into water and carbon dioxide, which escapes as a gas. In this case, were changing the number of Mentos dropped into each bottle, so everything else has to stay the same. This science kit seeks to challenge kids to solve problems in creative ways that will prepare them for future science classes and nurture their lifelong imagination. Gruber, B. The other bottles were heated in a water bath on a hot plate for approximately 1020min. WebFun Science Experiments // Mentos and Coke / Soda ExperimentIncludes BOTH US size and Australian A4 sized files/spelling!This fun experiment explores the physical reaction between mentos and diet coke / diet soda creating an impressive geyser of carbon dioxide. [27][28] Thus, the geyser reaction will still work even using sugared drinks, but diet is commonly used both for the sake of a larger geyser as well as to avoid having to clean up the stickier residue left by a sugared soda. To make any of these tests meaningful, youll need to find a way to measure the height of the eruption. To the naked eye, Fruit Mentos are shinier than Mint Mentos, and therefore should be smoother. The longer reaction time is due to the many growth sites associated with the porous molecular sieve beads. Figure 1(a) qualitatively demonstrates that the small cubic table salt grains have a high surface area to volume ratio, thus providing many growth sites for the carbon dioxide in the Diet Coke. State briefly what you tried, what were your results, and what you might do differently next time. The scale bars in each image represent the lengths (a) 200m, (b) 100m, (c) 20m, and (d) 20m. The work required to form a bubble in sugar water and aspartame is 74% and 67%, respectively, of the work required to form a bubble in pure water. Science teachers found that Mentos candies had the same effect when dropped into a bottle of any carbonated soft drink. The pH of the Diet Coke after the baking soda reaction was 6.1, indicating that much of the acid present in the Diet Coke was neutralized by the reaction. What is the dependent variable of Coke and Mentos? In the Mythbusters episode1 a Mint Mentos and a brightly colored Mentos were dropped into Diet Coke, and although the Mint Mentos caused the expected eruption, the brightly colored Mentos did almost nothing. The tubes of candies were threaded onto a pipe cleaner and dropped into the soft drink to create a geyser. Record the temperature. The speed with which the sample falls through the liquid is also a major factor. Each time, she was covered in more soda until her once-pink dress was now more Coke-colored than pink! Now its time to actually run the experiment, but first, we need to make a hypothesis. [16] In October 2010, a Guinness World Record of 2,865 simultaneous geysers was set at an event organized by Perfetti Van Melle at the SM Mall of Asia Complex, in Manila, Philippines. CYSF Or, attach plastic piping or tubing to extend the openings neck. Soda is made of sugar or artificial sweetener, flavoring, water and preservatives. [Full Guide]. The color combined with the small size of the salt grains made it too difficult to see, and therefore difficult to determine the time of fall for the table salt. Regular Coke does not work with Mentos because the Diet Coke uses Aspartame instead of sugar, which regular Coke uses. Many consider Diet Coke to be the optimal option, and it's been studied and confirmed as having the strongest effect. Due to the small amount of caffeine in a 2l bottle of Diet Coke, we do not agree that the caffeine in Diet Coke contributes significantly to the reaction. What happens when you drop Mentos in a bottle of coke? 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. Pull the index card away swiftly, dropping the candies into the soda. If we assume that LV is similar for Diet Coke and Caffeine Free Diet Coke, then the work required for bubble formation for Diet Coke is 90% of the work required for bubble formation for Caffeine Free Diet Coke. The quantitative roughness information detailed in Table V was taken from this image. While science teachers have been dropping candies and mints into 2-liter bottles of soda for years in an effort to release all of the dissolved carbon dioxide, the Mentos and Diet Coke reaction became world-famous in 2005. Muir, H. (2008, June 12). However, the larger rock salt pellets fall quickly to the bottom of the 2l bottle, while the much smaller table salt grains fall more slowly due to their smaller weight and size. Beware of the 20-foot stream of soda that will erupt when you pull off this experiment. Did a child really die from combining Mentos and Coca-Cola? This increase means that the molar concentration of the gas in the solution must drop for the same value of the partial pressure, which implies that gases become less soluble in liquids as the temperature increases. However, the importance of the presence of surfactants in the Mentos cannot be denied. It is clear from Table V that the roughness of the sample is a major contributor to the explosiveness of the reaction. Using any more than seven Mentos mints is just a waste, according to these soda-soaked science enthusiasts. Mentos and Coke Experiment How to Do It! half a roll) in the test tube. The candies catalyze the release of gas from the beverage, which creates an eruption that pushes most of the liquid up and out of the bottle.[1][2]. Dont miss our other super-fun and hands-on experiments in our huge online experiment library! Record your observations in a logbook. Diet Coke and Coke Zero react better with Mentos than regular Coke does because of the absence of sugar. Thank you so much. 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. A lack of sugar makes the soda mixture less viscous, given the presence of sweeteners, like aspartame, lowering the surface tension even more than usual. The dependent variable is the the Diet Coke with the mentos because it depends on the mentos to have a chemical response. This hypothesis was also proven false as The thing that makes soda bubbly is invisible carbon dioxide, which is pumped into bottles at the factory using lots and lots of pressure.
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