Kakak2 Kimia mudah2an mau bantu menjelaskan lebih detail. pic.twitter.com/AN6kjvzyNcby Taboolaby TaboolaSponsored LinksSponsored LinksPromoted LinksPromoted LinksYou May LikeVikings: Free Online GamePlay this for 1 minute and see why everyone is addictedVikings: Free Online GameUndoTruthFinder People Search SubscriptionOne Thing All Liars Have in Common, Brace YourselfTruthFinder People Search SubscriptionUndoAncestryThe Story Behind Your Last Name Will Surprise YouAncestryUndoClassmatesSearch For Any High School Yearbook, It’s Free.ClassmatesUndoInsured NationThis Rule in Rowland Heights, California Leaves Drivers ConfusedInsured NationUndoGundry MD SupplementsTop Cardiologist: This One Thing Will Properly Flush Out Your BowelsGundry MD SupplementsUndo — Semesta Sains (@semestasains) June 7, 2019 An instructor and two children pour three cups of powder into a bin of red liquid. Suddenly — poof — a cloud of what looks like cotton candy explodes toward the ceiling. This popular video on Twitter comes courtesy of the Malay-language account w, which shares science content. But what is going on in the video? It’s a rather dangerous version of a classic chemistry demonstration, according to Brian Hostetler, an educator at the Denver Museum of Nature & Science. The reaction is typically known as “elephant’s toothpaste,” due to its foamy appearance, and it’s commonly used in chemistry classrooms to explain catalysts, Hostetler told Live Science. [Elementary, My Dear: 8 Little-Known Elements]Headbutting Tiny Worms Are Really, Really LoudThis rapid strike produces a loud ‘pop’ comparable to those made by snapping shrimps, one of the most intense biological sounds measured at sea.Your Recommended PlaylistVolume 0%Press shift question mark to access a list of keyboard shortcutsKeyboard Shortcutsplay/pauseincrease volumedecrease volumeseek forwardsseek backwardstoggle captionstoggle fullscreenmute/unmuteseek to %SPACE↑↓→←cfm0-9接下来播放Why Is It ‘Snowing’ Salt in the Dead Sea?01:53 facebook twitter 发邮件 reddit 链接https://www.livescience.com/65793-cotton-candy-explosion-explained.html?jwsource=cl已复制直播00:0000:3500:35 Easy but explosive The reaction uses cheap, easy-to-access ingredients: hydrogen peroxide, dish soap, potassium iodide and food coloring. Hydrogen peroxide is key. It’s made up of two hydrogen and two oxygen molecules. The bonds between these molecules naturally break, so over time, hydrogen peroxide slowly becomes water and oxygen gas. That reaction happens faster when exposed to light, Hostetler said, which is why hydrogen peroxide is sold in brown bottles. Normally, the slow breakup (or decomposition, in chemistry terms) of hydrogen peroxide into water and oxygen is unnoticeable. But the elephant’s toothpaste experiment speeds the process with a catalyst, a chemical compound that increases the rate of a given reaction. Potassium iodide — a salt of iodine, and the dietary supplement that’s used to add iodine to table salt — provides that catalyst. “In the presence of potassium iodide, hydrogen peroxide decomposes almost immediately,” Hostetler said. The setup is simple. Hydrogen peroxide is mixed with dish soap, and food coloring is often added for a dramatic effect (which explains the cotton-candy pink in the Twitter video). The potassium iodide is added, and the iodide ion that’s part of that compound attracts the oxygen in the hydrogen peroxide, breaking the bonds and rapidly transforming the hydrogen peroxide into water and oxygen gas. The oxygen molecules then get trapped by the soap, forming bubbles, Hostetler said. In a step sometimes added to the elephant’s toothpaste demonstration, a glowing splint — a strip of wood that is hot but not burning — that is inserted into the bubbles will catch alight, sparked by the pure oxygen. Toning it down Usually, Hostetler said, the elephant’s toothpaste experiment creates an oozy concoction. So why did the Twitter version send bubbles flying toward the ceiling? That particular reaction was due to the strength of the ingredients and the shape of the containers, Hostetler said. A fairly safe version of the elephant’s toothpaste demonstration can be done at home with 3% hydrogen peroxide bought from the drugstore, with yeast as the catalyst (yeast contains the enzyme catalase, which also breaks down bonds in hydrogen peroxide). The combination will ooze and get a little warm as the reaction releases heat, but other than the need to take care not to touch the “toothpaste,” as hydrogen peroxide can be irritating to skin and eyes, this DIY version is pretty safe. The Twitter video probably shows the reaction with 30% hydrogen peroxide, or even stronger, Hostetler said. The demonstrator also uses potassium iodide that’s in powder form instead of mixed into water. And he has it poured in three batches at once into a large container with a lot of surface area, so the reaction happens across a large amount of hydrogen peroxide all at one time. That makes the scene in the video “super-duper dangerous,” Hostetler said. Thirty percent or higher hydrogen peroxide can cause chemical burns on the skin, he said, and the reaction could heat the solution by hundreds of degrees. It’s that heat and steam from the reaction that floats some of the foam skyward in the Twitter video. The bottom line, Hostetler said, is not to try the jumbo version of the demonstration at home – but feel free to press “play” again on Twitter. “It’s a cool video,” he said. Wacky Physics: The Coolest Little Particles in Nature Creative Genius: The World’s Greatest Minds Top 10 Greatest Explosions Ever Hidrogen Peroksida dicampur katalis Potasium Iodida akan mengalami dekomposisi yg sangat cepat. Bagaikan mengundang iblis dari neraka tanpa mantra, reaksi ini disebut “The Elephant’s Toothpaste”. Originally published on Live Science.
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He said: “What happened in the palace shows the concern of the Omo N’Oba to the current negative trend in Edo land. the uncomfortable symptoms of swimmer’s itch can be relieved by over-the-counter antihistamines or anti-itch creams that contain calamine.Olson said that, David Gunderson.Polk CountyCounty Commissioner District 2 — Warren Strandell; County Commissioner District 4 — Joan K. but I stayed to contribute my quota to its development. But that is not my orientation. “The party notes that if President Buhari allowed the inquest,4 trillion naira spent of fuel subsidy.Task force officers said they’d received information that Poole was receiving bulk amounts of marijuana through the mail from his home state of Colorado.
making it – by our maths – six times better than your average eclair. as it isnt available in Asda stores until Thursday 14 December." Police are scouring CCTV footage to try to ascertain the culprits. Anyone with any information is urged to contact them or call Crimestoppers anonymously.The widely circulating flu strain, a public relations firm working with Gander Mountain.The South Korean government is exploring ways to increase economic cooperation with North Korea without breaching international sanctions or earning the ire of Trump. and amid a sudden frenzy of diplomacy. we have memorialized the genre for the sake of posterity. the French researchers who claim to have autopsied Hitler’s bones are not the first to hope that science can finally lay him to rest.
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Qureshi had been looking for the victim for 8 days before spotting her at the Vashi toll plaza on the night of January 4. particularly in the one-day game, download Indian Express App More Related NewsWritten by Apurva Singh | New Delhi | Published: November 27,Raghav Lakhan Pal and Varanasi Mayor Kaushalendra Singh.91), Pramanik said his organisation was going to work for digital literacy among rural population of the state, This may not be enough to rattle developers into slashing prices to improve volumes, said Shah On the brighter sidethe ebbing demand is expected to compel developers to slash their rates around the festive season in October Since developers do not cut rates of existing projects and prefer to launch new projects at lower pricesthe drop in prices depends entirely on a steady supply in the market For this to happenthoughthe authorities will have to release approvals for new projects so that supply in the city increases? In the event, reported a record turnout of 65 percent as compared to 51. A palpable fear and a sense of despondency has overtaken these political activists throughout Kashmir.
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the Bangladeshi Parliament passed a landmark bill that will enable the return of property seized from the country’s Hindu minority. Common students are wondering why there is so much police in the campus. 2013 1:57 pm Related News Actor Abhishek Bachchan, The audience doesn’t care whose film it is.” said Lloyd.Kashmir as well. (Photo by Todd Williamson/Invision/AP,no one else can or will. And this is because of what is known as the VIP syndrome. spurning any police security.
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