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When you drop Mentos into a plastic Coke container, you might have a rocket. Or it might not work at all. Or it might surprise you! -via I Am Bored
Steve Spangler has produced several toys based on the Coke/Mentos reaction, such as the Mentos Geyser Tube and the Soda Geyser Depth Charge Kit. The newest, the Soda Geyser Car, was introduced at Toy Fair 2011, which is still going on in New York City. Cool Things has two videos of the car in action, so you can watch as this vehicle moves under its own “rocket power” fueled by Mentos and Diet Coke. Looks like a lot of fun for kids who have plenty of room outdoors and a water hose to clean themselves off before they enter the house! Link -Thanks, Sunny!
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You knew it was coming sooner or later. The geniuses from Eepybird, who made an art form out of the Mentos/Diet Coke phenomenon, have harnessed their creation to propel a vehicle. Link -via Unique Daily
Chemistry is a fascinating science, but it's often taught poorly in today's boring schools. Here's how chemistry should be taught: by mad scientists! Here's Neatorama's list of the Top 10 Mad Science-Worthy Chemistry Experiments:
The Briggs-Rauscher reaction is a well known example of oscillating chemical reactions, also known as chemical clocks because the periodicity can be used to tell time. What's going on in the beaker is actually quite a complex set of chemical reactions. Here's how to do it: Link
Who'da thunk that Gummy Bear can be so ... violent? Here's what happen if you drop a Gummy Bear (which is mostly sugar), to a tube of molten potassium chlorate:
Mentos in various carbonated liquids. From left to right: carbonated water
(Perrier), Classic Coke, Sprite, and Diet Coke. By K.
Shimada [Wikipedia]
You've all seen this before. The Diet Coke and Mentos experiment by Fritz Grobe and Stephen Voltz of EepyBird was the stuff of Internet legend back in 2007. But what exactly happens when you drop a Mentos into a solution of Diet Coke?
MythBusters explain:
According to Hyneman (he's the mustachioed MythBuster), it's a process called "nucleation," in which the particular chemistry of the Mentos candy interacts with the chemistry of the carbonated Diet Coke, causing the carbon dioxide gas, or CO2, to suddenly come out of suspension in the liquid and make a break for freedom. [...]
Hyneman says, "There's a cascade that happens with -- it's a little esoteric -- an ion exchange. Basically the Mentos start to dissolve, and it's like tripping a switch. It's not what you would call a chain reaction, because that's something else in chemistry terms, but it's a cascade whereon all of a sudden, all of the CO2 that was contained in the liquid is suddenly not as attracted to the liquid as it was before, because of this slight change in the chemistry that occurs."
Whatever you do, don't eat a mentos then chug a mouthful of diet soda, mmkay?
Yes, even elephants need to maintain good dental hygiene, but what kind of toothpaste do they use? Here's a favorite chemistry demo called Elephant Toothpaste (no, elephants don't actually use this as a toothpaste, silly - it's only called that because it looks like the kind and quantity of toothpaste an elephant would use).
This one's easy to do, all you need is dish soap, hydrogen peroxide, and potassium iodide: Link
What happens if you put a grape and nuke it in a microwave? You get something very cool ... and dangerous at the same time, because it *will* ruin your microwave, release poisonous gases, and you *can* burn down your house - so don't do it, mmkay? Watch:
What just happened? Here's the explanation, according to The Plasma Universe:
It is relatively easy to generate a plasmoid using a microwave and a medium that will initiate the formation of a plasmoid, this can be caused by the carbon microparticles in the smoke from a naked flame or match, which ignites and moves about as plasmoids, and some biological cells are known to produce plasma under microwave conditions, such as grapes (electrons try to move through highly resistive grape-skin, and plasmoids may form) This is due to the fact that microwaves, being high frequency electromagnetic radiation in the GHz range, are capable of exciting electrodeless gas discharges in air, similar to the process used in Sulfur lamps.
Got that?
Quick: what color is fire? Orangey red? Obviously you haven't seen alcohol, barium chloride, boron, strontium, calcium, lithium, sodium, copper, and potassium salts set aflame ...
You've probably heard that fire needs oxygen to burn (indeed, the principle behind CO2 fire extinguisher is to use the heavier carbon dioxide to displace the oxygen needed by the flame).
But does a fire really need oxygen? Not burning magnesium! It'll burn even when encased in dry ice (solid CO2). Note: magnesium shavings are used - not powder, which will explode if you try to set it on fire.
Ferrofluid, a colloidal mixture of nanoscale magnetic particles in a solvent, reacts to magnetic field in an awesomely bizarre way. Sachiko Kodama uses ferrofluid to create dynamic sculptures called Morpho Towers:
A drop of mercury in a solution of potassium chromate and sulfuric acid, set so it's almost touching an iron nail, will start to beat like a heart. Journal of Chemical Education explains why: Link
John Farrier posted this back in May, 2009 but it's too good not to post again here. Behold, the World of Chemistry, a video from the Europe Research Commission using a dance party to explain basic chemical reactions.
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Don't miss these other fun science articles from Neatorama:
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If you recall the Diet Coke/Mentos phenomenon, you already know Fritz Grobe and Stephen Yoltz, even if you don’t know their names. They’re the geniuses behind the theater company Eepybird.
Geeks Are Sexy has a two-part interview with Grobe and Yoltz about how they took six months to develop the Bellagio Fountain routine for their “Experiment #137″ video and what went into the creation of their “Sticky Notes Experiments” video the next year.
You’ll also see them do the Diet Coke/Mentos routine in front of a live audience at the Maker Fair! Link
