When you are ready, remove the card and let all the Mentos drop into the soda … Show your volunteer how to start and stop your video camera. What will be your highest height? The company that prepares this extract, Stepan Company in Maywood, New Jersey, also legally makes cocaine for medicinal purposes. All rights reserved. Try using other things instead of Mentos candies to start the reaction, like rock salt, sand, pennies, or dice. Start your mornings with the acclaimed 'Qrius Mornings' newsletter that gives you our best article of the day right in your inbox. Mentos® is a registered trademark of Perfetti Van Melle Corporation. Theories abound as to why … Make sure that the bottle is level and stably standing straight up. QUESTION: Does the number of Mentos affect the height of the explosion when added to Diet Coke? Now, prepare your test site so you will be able to measure how high the geysers go. The temperature was 52 F. In this experiment, mentos caused a eruption in a 2-liter bottle of Diet Mountain Dew erupted, thus we concluded that diet Mountain Dew did have Phosphoric Acid because it caused eruption with mentos being dropped in. Put the open end of your tube of Mentos on the card and place it directly over the opening of the soda bottle. To determine the height of each geyser, watch the videos for each trial using slow motion and pause the recording when the spout is at its maximum height. For each graph put whole Mentos and crushed Mentos on the x-axis (the horizontal axis) and average reaction time, average geyser height, or soda volume remaining on the y-axis (the vertical axis). What does the inside of the Mentos candies look like? As the Mentos candy sinks in the bottle of soda, the candy causes the production of more and more carbon dioxide bubbles. 4. Place the tube in the top of the bottle, but don't let the Mentos … Try different kinds of candies with different shapes and textures. When the bottle stops spouting, stop recording. Now you are ready to watch your videos and analyze your data. Amazon.com, How might the speed at which the Mentos® candy sinks in the soda affect how large the geyser is? (2020, November 20). Write this in your data table. When all four candies are cut into pieces, carefully set the piece of wax paper, with the candy pieces still on it, aside somewhere safe. Determine if using crushed Mentos candies will change the height of exploding soda scibuddy@sciencebuddies.org. Science Buddies, a 501(c)(3) public charity, and keep our resources free for everyone. The reaction is so intense, you can make a rocket propelled … To find out the volume of Diet Coke remaining in the bottle after the eruption, pour the remaining soda into a graduated cylinder (and measure in milliliters [mL]) or into measuring cups (and measure in cups). That means that all of the pieces of the reaction are there, The buoyancy of the bubbles and their growth in size will quickly cause the bubbles to leave the nucleation site and rise to the surface of the soda. Place a piece of wax paper on top of the cutting board. Our top priority is student learning. But those gas bubbles want to escape, making it no wonder that soda makes you burp! When mint or fruit Mentos are dropped into a fresh bottle of Diet Coke, a jet of Coke whooshes out of the bottle's mouth and can reach a height of 10 metres. This is another reason Mentos works so much better than other similar confectioneries. Use the tape marks in the background to do your best to estimate the height (in meters) of the spout. Why do you think all of this is important? More to explore Physicists Explain Mentos–Soda Spray … With all of the tiny bumps on a Mentos, it is easy to see how you have yourself a geyser! In addition to that, the gum arabic / gelatin ingredients of the Mentos, combined with the potassium benzoate, sugar or (potentially) aspartame, in Diet sodas, also help in this process. Because a Mentos candy is relatively dense, meaning that its … You can also increase the effect by adding more surfactants to the soda before you add the Mentos, like adding a mixture of dishwasher soap and water. At the base of an exterior wall with no windows, set one bottle of Diet Coke. Take one of the index cards and roll it into a tube, slightly larger than the diameter of a Mentos candy. A Mentos candy can help with this. So let that be a lesson to you. Science Buddies participates in affiliate programs with ... + More They’ve since got around this by using cocaine-free coca leaf extract. You may want an adult to help you crush the Mentos candies. But if you were to look under a microscope, you would see tiny bumps coating the entire surface of the candy. This means that each tiny bump acts like a place where the physical reaction can get a kick start, where a bubble of carbon dioxide gas can form and escape the solution. Put the Mentos in the pouch and roll the napkin with the Mentos into a tube shape. If you try this project with regular Coke, the eruption should still happen but its sugary content may make cleaning more difficult. If a Mentos candy were crushed and broken into little pieces, the candy would be less compact, and consequently less dense, because there is now more space and air between the little pieces. While there were initially different versions of Coca-Cola being sold (depending on the manufacturer, of which there were three primary businesses Pemberton had sold the formula to), all the versions contained cocaine, with some estimates of up to nine milligrams of cocaine per serving. In fact, it was so much fun that I wrote up our experiment, created observation and tracking … Adding chopped Mentos to Diet Coke will still cause an explosion, but it won't be as big or intense as the one caused by regular, whole Mentos. In these cases, the ingredients end up lowering the surface tension of the liquid, allowing for even more rapid bubble growth on the porous surface of the Mentos: higher surface tension = more difficult environment for bubbles to form. I’ve also noticed that if you suck off the chocolate of a Snickers bar and then chew it, and swallow, then very quickly afterwards drink some soda, you’ll also get a nice foamy effect in your mouth. Mentos® mint flavored candies (24 candies), Blue painter's tape; This can be purchased at most hardware stores or online at, Eye protection, such as goggles or glasses, Outdoor space next to an exterior wall where tape can be applied with permission. When you pour some soda into a glass, the gas stays trapped in the solution by the surface tension of the water. Write these averages in your data table. Set up the video camera with a tripod, if available, and make sure that the soda bottle and marked measurements are in view. Prepare three groups of crushed and cut Mentos like this one. It seems likely that the surface of this vitamin must have been porous and it did most likely also contain at the least the gum arabic. I read that diet soda is recommended because it’s less sticky than regular soda, but regular soda should work too. You needn’t taste the … Write to us at Qrius delivers fresh, immersive writing that answers the question 'Why should I care?'. Using the same number of Mentos candies each time, repeat the experiment with the chilled Diet Coke, the regular Coke, the other diet soda, and the regular version of that same soda. If you use a smooth surfaced Mentos, you won’t get nearly the reaction. Please enter a search term in the text box. Coke/Mentos reaction using a pH meter with a 2 point calibration. Why? On a similar note, As an aside, while I personally have never tried drinking Diet Coke and eating Mentos, I have had a similar experience after taking a new kind of  multivitamin I’d not tried before, combined with drinking a 16 ounce container of Dr. Pepper. An adult may be needed to help crush the Mentos candies. Water molecules are polar and attracted to each other. But this is not a chemical reaction at all! A Mentos dropped into a bottle of soda acts as a surfactant, meaning it reduces the surface tension of the soda. One factor that may affect the size of the Mentos and Diet Coke eruption is how quickly the Mentos candies sink in the soda. After we put the mentos in the Diet Coke… This entertaining video demonstrates how to make a bottle rocket using tape, paper napkins, Mentos, and Diet Coke or Coke Zero. First, you will need to prepare your crushed Mentos candies. Science Buddies Staff. 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. So, basically, they are more “ready” to escape the liquid, resulting in a faster reaction. On the wax paper, carefully use the knife to crush and cut four Mentos candies into many small pieces, as shown in Figure 2 below. Swigging some Coke and swallowing some Mentos will essentially cause a lot of the carbon dioxide trapped in the soda in your stomach to suddenly bubble and try to escape. Some other First, the act of drinking soda releases quite a bit of the carbonation in it, limiting the possible effect. In fact, the level of acidity in the Coke before and after the Mentos geyser does not change, negating the possibility of an acid-based reaction (though you can make such an acid based reaction using baking soda). Ultimately, the pressure became too much and I threw up a ton of foam (red, like the multivitamin coating). On a piece of wax paper, carefully crush and cut four Mentos candies into many small pieces, as shown here. Wear safety goggles when testing the explosions so you will not get sprayed in the eye! Mentos are fairly dense objects and so tend to sink rapidly in the liquid. The “pop” part of the term came about in the early 19th century, with the first documented reference in 1812 in a letter written by English poet Robert Southey; in this letter he also explains the term’s origin: “Called on A. Harrison and found he was at Carlisle, but that we were expected to supper; excused ourselves on the necessity of eating at the inn; supped there upon trout and roast foul, drank some most admirable cyder, and a new manufactory of a nectar, between soda-water and ginger-beer, and called pop, because ‘pop goes the cork’ when it is drawn, and pop you would go off too, if you drank too much of it.”. You can measure the height of the geyser with a wall, a helper, and a video camera. Another factor contributing to the size of the geyser is how rapidly the object causing the foaming sinks in the soda. While you’ll sometimes hear an urban legend that people have died from drinking Diet Coke and eating Mentos, to date there has not been a single documented instance of this ever happening. What sodas react with Mentos? Figure 1. project ideas are: Test different kinds of carbonated beverages, such as regular Coke versus Diet Coke or other carbonated beverages. Have your volunteer start the video camera and speak into the camera and say, "This is trial number 1 using whole Mentos.". Science! Here is how one science fair student from Marin County, CA set up his Diet Coke and Mentos experiment. On the exterior wall, use a tape measure and the blue painter's tape to mark off the height from the top of the soda bottle in meters (m), as shown in Figure 3.