Elephant's Toothpaste (slow motion) - Periodic Table of Videos
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- Опубликовано: 6 окт 2024
- Behold, the popular Elephant's Toothpaste reaction... We look at it in some detail.
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Raw footage of slow motion: • Elephant's Toothpaste ...
Hydrogen Peroxide solution is catalysed by Potassium Iodide - washing liquid (for foam) and food dye (for colour) make the whole thing more visible!
This video features Professor Martyn Poliakoff, Dr Samantha Tang and, of course, Neil Barnes.
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From the School of Chemistry at The University of Nottingham: bit.ly/NottChem
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The professors under the tree watching the chemists play around makes this even better
1:00
Neil: You left the Hydrogen Peroxide bottle right next to it.
Sam: Oooh sh---
My favorite part of this video is Prof Poliakoff sitting in the grass waving.
@@davidvozny 7:42
Prof poliakoff was not waving but the other one was waving
I loved seeing the Professor off to the side during the taping. It's great seeing someone still passionate about their projects.
so peaceful. A calm morning with the professors sitting in the grass and two people doing an experiment..recording,observing,interpreting,understanding it.. beautiful music playing in the background..this is so tranquil.. "think of the science" well said professor..beautiful..this video is a piece of priceless art
and, of course, Neil Barnes.
Neil is the real star...clint eastwood of chemistry. lol.
under the circumstances ...perhaps the "Teller" .. after all .. as clarke said .. Any sufficiently advanced technology is indistinguishable from magic.
If you look closely you can see him talking. ;-)
***** Neil entering chem lab ...turns to janitor...get 2 mops ready...
exiting chem lab..sorry my mistake 3 mops.
He is the Stig's scientific cousin.
He has one of those faces that seems to think everything is a waste of time.
I had a teacher do this in a 5L flask with a 1-hole stopper
+TheGinginator14 what happened?
+Periodic Videos I believe there is still a hole in that classroom where the spray punched through the foam ceiling
Why don't you guys try that?
+TheGinginator14 Brilliant!!!!
+Snaperkids we need video/pictures.
"Think of the science, not the clowning of the people of the people doing it." That's why we watch periodic videos! Great as always.
How about a proper de Laval nozzle on top? That should really get that foam column going. You could probably liberate a nozzle from an old venturi pump.
This was my favorite demo to show children and students during my college years. It's always so much fun.
The Bell Rocketbelt, a real rocket pack invented in the 60s that can carry a person, uses the reaction of hydrogen peroxide with a platinum catalyst as it's energy source.
watching these videos is making me think wheter this is the future of studying - to just have educated people explain things in videos and you can watch them over and over again; maybe you chat with the professors afterwards for further questions
That's a lot of chemistry just to simulate an ejaculation.
less cleanup though
Foam-shot jokes were being made.
Watch Neil and the other lab technician :-D
Haha! When the oxygen saw the iodide ion he was like ''OI!''
did you just assume oxygen's gender ?!?
They were probably laughing at the camera being devoured by the foam.
mrt0ab -- Sure they were. thinking they made dirty jokes just seemed more fun to me :-)
I think she's a doctor
"what einstein told his barber"
what's that book bout ?
:P
Professor, your explanations are absolutely great.
Hypothesis: the conical flask is important because the area of the reaction interface is so much greater than the area of the opening. With a straight test tube, they're about equal.
One of the most visually pleasing experiments done in a while!
Awesome experiment!
considering the rest of the parameters same, the diameter of the conical flask would play a major role in controlling the intensity of the woosh (the eruption)
I would be so funny if they used this to propel spacecraft. Imagine just a foamy exhaust propelled in the opposite direction of the craft, being left behind ahahahahah.
Yes, you could also use it in space battles to distract the enemy... :P
The videos this channel produce are brilliant! Informative, yet entertaining and to a certain extent, intriguing. Keep up the great work, as you are inspiring young scientists (such as myself).
it was really interesting watching the food coloring along the side break cohesion in the soap column. It looks smooth where it emerges not in contact with the coloring and rough/broken where it does.
Sam's laugh at 4:23 = priceless.
I can never be so intrusted chemistry, even now I know english very much !! Thanks !!!!
It also works with blood as a catalyst. A former classmate of me was son of a butcher and sometimes brought a bucket of blood to our chemistry class.If I remember right, there isn't even a need of soap when using blood.
Brutal.
why does blood act as catalyst?
Our teacher explained us that H2O2 is poisonous and there are enzymes in the blood to eliminate it. Normally there are only very little amounts of H2O2 to deal with so the arising oxygen is solved in the blood.
Martyn is the Professor, Neil is the King
how often do students come and see what your doing?
More often than you went to your English lessons I hope.
That Guy, what is you're problem? :D
+That Guy what
That Guy
I also hope that
*you're
Am I the only one who noticed that the Professor got his hair cut? I miss the fluffiness of it...
Best part is Neil hiding his face when he laughs. He rarely breaks that straight face.
Experimentation is never a waste of time Neil! You never know the result until you try - you of all people should know that :)
Why isn't Sir Martin using snatoms?
Cos in the chemistry behind this reaction the relative lenghts of the bonds are important. You can't show that with snatoms.
What does the length of a bond actually do? Eg, what would "Oxygen" be with longer bonds? What determines bond length?
+Ian Jeffray generally bond length is pretty closely related to bond strength. In this reaction the oxygen-oxygen bond length in the peroxide is longer then the bond length in oxygen molecule being made. So a stonger bond is being made; which is part of the reason why the reaction goes.
But actually bond lengths are just averages cos actually all bonds vibrate. If you heat up a molecule the bonds get more energy and vibrate more and so the bond length increses. So oxygen (O2) with a longer bond length would be oxygen with more energy i.e. hotter.
I have snatoms
The kit that I have has connectors that allow for double and triple bonds.
Do a video on why energy is released when making bonds, would be really interesting, i have some concept of it, but to have a professor's input would be great.
Thank you for showing this experiment, spectacular! Wish I could buy the ingredients for this where I live, could get up to some mischief!
You guys need a video on all the different desktop models of molecules you guys make... Seriously, you must have 20+ brands / types of widgets to make model molecules out of.
I love the look on Sam and Neil’s faces in 1:03 when they realize the foam has hit the camera...
i wish had a professor like him, he earned his knighting in my opinion,thank you for teaching the world sir
I've been waiting for a good explanation of this viral demo. Periodic videos couldn't have don't it much better. Thanks!
for your 'barking dog' tube, your colleague's on the right track. what your missing is the reduction of pipe size to increase pressure. if you had more of a cone shaped tube, the pressure from the reaction would build up around a tinier hole. imagine running a high pressure hose through a straw. also, the higher the heighth, the lower the pressure
Who is the lucky sap that got to clean up that mess?
Neil
Not students, they would break the glass.
Hmm, let me think...
I got this! It's Neil!
It's always Neil.
Neil.
If I understood the video correctly, the foam is just soap with pure oxygen in the bubbles. Cleaning it up shouldn't take more than a bit of water.
i wish i had a chemistry teacher like this when i had classes. My chem. teacher from school was horrible, i couldn't even read what he wrote and he wouldn't tell you if you asked.
Hey, can you please make a video about ''The Ouzo effect''?
This effect takes place when you add water to an alcoholic drink like Ouzo or Anis, Both the water and the drink are clear liquids but when they are mixed the solution becomes foggy.
I've heard that this happens because some type of oil precipitating out of solution when the alcohol that keeps it in solution is diluted.
Please correct me if i'm wrong.
Yes, and I'd also like to know why pastis (french ouzo) forms "clumps" at near to 0C, which don't disperse when it's warmed up again. More physical than chemical I think, but interesting...
Please make a video about ''The Mr Oizo effect''.
Anithe was my favorite flavor in FF7.
I thought it had to do with the light being reflected differently from each of the liquids
I think its that the refractive index is different for each liquid
You get a similar thing when making a yeast starter for brewing beer. When wort starts to boil you get a thing called hot break. Makes for a sticky mess on the stove if you're not careful.
I love the science in action "Okay you were right"
Nice educational explain man.
Great video. 🙂
Thanks
By far the best channel on youtube.... Just discovered it. Have a lot of catching up to do. Keep up the awesome work!
It would be cool to see how narrow you can make the top, and how high you can get the spray to go, before the flask bursts from the pressure!
I wanna see this experiment done in space.
At school, I had to pick in between Physics and Chemistry. I love Physics and chemistry. It was a horrible decision to make... And your videos just makes me love chemistry so bad... I'm gonna do it as a hobby.
I just want to go there and hug Mr. Martin, I wish he was my grandfather :P.
wow that Safety pin to lock the bag, I remembered by school days lol
Fascinating Dr. Sir, Prof thank you so much for your explanation!
Thank you, I now completely understand this reaction. This is a fantastic video.
Saya bukan ahli kimia, tapi saya sangat menyukai channel ini. cukup menarik dan menambah ilmu pengetahuan.
(saran) dapatkah periodic videos membahas tentang batu dari
ruang angkasa? membahas komposisi atau materi penyusun batu dari
pecahan meteor atau komet atau batu dari bulan? Sepertinya cukup menarik
:D
Why not add the dye to either hydrogen peroxide or catalyst so it mixes evenly?
I think the idea is to produce a streak like toothpaste has!!!
+Periodic Videos should do drain o bomb and why the gas is created
probably mixing it thoroughly would release a pot of oxygen from the hydrogen peroxide and so it wouldn't fo off as well.
It's to mimic the stripes you get on some sorts of toothpaste.
More videos with Sir Martyn!
You and you're students are amazing keep making more video's
Comparatively, how much higher did the elephants paste get with each vessel? The barking dog tube being obviously longer than the conical flask; It may have reached a height higher than the conical flask regardless of its acceleration.
Neil's gasp said "I have to clean this up".
When a alarm just set off while the elephant toothpatse
Can you guys make a video talking about one of the most beautiful (in my opinion) tests? Tollens reagent in an Aldehyde at 60C. I love it, because I was the only one to perfect the reaction in my college class and got an extremely clear silver mirror.
Yo that splint was being kept lit af fam
At school, we crushed ice and salt, and squeezed it into an iron (about 4 inches long) tube and sealed it with a threaded bolt. The dinner bell sounded, we waited... the chemistry teacher then abandoned the experiment and extracted tube from icy bowl with large extractors, the tube exploded and bounced around our classroom like a bullet. no one was harmed.
You haven't taken into account the total height of the straight walled glass tube vs. the height of the erlenmeyer though.
Glad to see Sam back : ) Great video, as always, thanks!
This dude is sold old and I've bee watching him for so many years. I wonder what it'd be like to study at Nottingham.
So if I didn't use soap I could basically make a gas cannon with this reaction...
great video thanks for the video Brady
Neil is full of mysteries...
Do a video on how to know which catalyst is needed for which reaction
Suppose the hydrogen peroxide was boiling instead of being at room temperature, or if it wasn't boiling because there was a stopper in the top of the flask while it's being heated...
Could you do the "Electrons in solution" experiment? I think it would be very nice to see here on this channel. In case you don't know, it's a piece of sodium in ammonia. Not ammonia dissolved in water, liquid ammonia, condensed with a cold trap.
They have already done that!
Using Hydrogen Peroxide in this way is done in a Jet Pack. In that device, they use a silver plate as the catalyst, and direct the reaction results thru a jet nozzle
this is one of my favorite RUclips channels😁
Your vids are making me consider becoming a chemical scientist instead of a mechanical engineer
What causes the bonds to be created in different ways? How closely do the models match the actual molecules?
Neil, how much fun was it to clean out the tube this time?
i like the new glasses professer :D
you guys should do a video about the reaction between bismuth and perchloric acid
What would happen if you only added a small amount of the catalyst? would you be able to watch more of the reacton's start and propagation?
You can even use potassium permanganate instead of potassium iodide
Where did this reactions name come from?
I'm not an expert, but I believe it's because of the appearance and size of the foam.
hm, I would've guessed that the velocity merely depends on the size of the opening (and the amount of reactants)... Isn't the opening in the barking dog tube quite a bit larger?
When I was a young teenager I would mix manganese dioxide and hydrogen peroxide to generate oxygen (using a tube to displace a volume of water). I'll would bet the MnO2 could be used in place of the potassium iodide.
was the siren from a passing by police car or was it a warning to move away from the barking dog test tube? lol
I'm assuming here... that the count of bonds broken and formed that he gives is net, and that a bond doesn't jump from one atom to another while staying intact.
cool, even Neil was impressed
I need my morning coffee in this
Scientists went far away from the experiment but cameraman stays there? :D
maybe the camera was placed on a tripod
Camera zoom is a thing...
As a former camera operator, I can assure you we're quite expendable as long as our last shot is a good one. ;)
You can see from when he turns the camera up that he is right next to it
No, the narrow FOV and shallow turn of the camera is a result of it been zoomed in on a lens... just trust me on this.
This looks like a much better reaction for a model volcano.
Can you guys make a video explaining reducing and oxidising agents?
I love me some elephant toothpaste. I do it at work every so often.
How would it work if you plugged the end and contained the reaction? Would the pressure blow up the tube or would it simply heat up? (let's pretend glass is as solid as steel) How much does the reaction expand?
Yay, Sam is back!
Now i want to see it in a scaled up pipette!
In slow motion it looks more like whipped cream rather than (Elephant) toothpaste! Yum!
Can I adopt this Sir as my grandpa? He's great! :D
perfect explanation
Can you explain what an actual atomic bond is, and how does it work? I'm interested.
Neil relighting the match makes me wonder if a fine mist of fuel sprayed on this stuff would self-ignite.
If you mixed the hydrogen peroxide with a liquid with a low autoignition temperature, with the "toothpaste" be on fire? Because if so, you guys should do that demonstration.