I like how you can see the partial Rubidium glass container zipping around the bottom rim of the water container like a very fast torpedo. It must have went around like twice in the first tenth of a second cause you see it go by then it explodes again back at the point you seen it zip past. So either it expelled some of the metal out and exploded shortly after or it went around twice very fast. It almost had a pulsating tempo as if to keep it's momentum going.

@chrislong2256

2 жыл бұрын

,

It would be cool to repeat this in darkness to see the light emissions alone... Very cool!

@Rickyponting9834

3 жыл бұрын

If this experiment to be held in dark then sir form where the rubidium vapours will absorb reddish light to give violet colour? ......my imagination says this.....

@klausolekristiansen2960

9 ай бұрын

@@Rickyponting9834 No. The indicator blocks blue light, and looks red. The rubidium emits violet light. It would be visible in darkness.

@Rickyponting9834

9 ай бұрын

​@@klausolekristiansen2960 Your reply made me watch this video again 😊 By the way indicator as well as rubidium is said be absorbing light of visible spectrum of different wavelengths , And suppose it's dark then there will be no light absorbed and hence no light will emitted as well that's what I was trying to say bruh

Even hard as nails Brady couldn't bend the container. That's one tough container.

@atomicmrpelly

4 жыл бұрын

I was so hoping the Prof was going to say that!

How have I never seen this channel before? This video is 7 years old and I'm just seeing it for the first time. This is amazing.

I have a new respect for rubidium. That purple color is so vibrant!

@lolatomroflsinnlos

9 жыл бұрын

The purple ist just from the indicator.

@ElectricPyroclast

9 жыл бұрын

***** Oh, the description said phenolphthalein. Never mind! But still awesome!

@renanissler6081

7 жыл бұрын

^

@aparnavellala624

3 жыл бұрын

Rubidium salts are usually white,water-soluble solids giving colourless solutions-only the flame is bright blue!

If you watch the right side of the screen carefully at 5:48 through 5:50 you will actually see that the ampule has jumped up out of the water and is near the top of the screen. What I think actually happened is that your second reaction occurs when the ampule lands back in the water, as the reaction begins at the right had side of the vessel at around 5:57 to 5:58. To take this a little further, I would say that what is happening is similar to the charcoal/liquid oxygen reaction where the gas that is created is keeping the ampule bouncing on top of the water and then it throws it up into the air where the reaction slows and when it hits the water again it begins to strongly react. You are also able to see shards of glass ejected from the water towards the right of the screen between 5:44 to 5:47 which seems to indicate that you have a pressure wave that not only propagates from the explosion to the right but also hits the side of the container driving that wave towards the right as well. When the ampule hits at the right around 5:58 the reaction pressure waves seem to move back towards the left.

@alessandrorosa3005

10 жыл бұрын

Actually looking at it again and pausing frequently, I think that you can actually see the ampule circling around the indented ring of the container from the left side where it first enters the water. The signs are the purple light and stronger explosions at around 5:46 and 5:47 at the front of the container, just before the ampule ejects up from the water on the right hand side.

wow, absolutely brilliant! i didn't catch the emissions until the professor mentioned it. there's a lot going on in such a short amount of time. can't wait to see more chemistry in slow motion.

When I first saw the announcement of slow-mo videos on this channel, I really wasn't sure I'm gonne like them. But these videos are brilliant Brady! You don't get lost over the beautiful slow-mo pictures - there is still a lot of chemistry involved. Very nice!

Poor Neil XD

One of the coolest videos you guys have made! Loved the Rb emission part, I didn't expect that at all.

this is one of the best slow motion reactions I have ever seen. Thanks Brady and Destin.

I'd like to thank you guys. Thanks to you, I've managed to ace a verbal examination regarding my acceptance into a high school that trains chemists - the best one in Hungary! Thanks to your videos, I've managed to talk about very broad topics for quite a long time with the examiners and we both enjoyed the conversation. Once more, Thank you very much!

Couldn't agree more. However you all and Brady came up with the idea that the professor could add detailed narration is beyond me, but thanks for reinforcing the material in such a personal manner.

Absolutely stunning. Those light emissions are beautiful. Well done, and I enjoyed the analysis!

That was the most spectacular reaction you've had in a video yet. Amazing.

I wonder what sort of reaction you would get if you just kinda put a small amount of every element known to man into a container together and shook it about a bit

@darkIkarus

8 жыл бұрын

You'd probably give birth to a tiny earth. =D

@RenbeOfficial

8 жыл бұрын

+darkIkarusEssence Aww, I like that answer. Thank you! :'D

@trevorbrown5714

7 жыл бұрын

It's a very interesting question, and you've made me think quite a bit about it! I have a background in chemistry, and my initial thought is that you would get a reaction from the reactive elements. So hydrogen, sodium, lithium, chlorine, oxygen, and especially fluorine would be most involved in the reactants, each forming random compounds depending on what is around them. Water may form, table salt may form, it's anybody's guess. Then you would have the noble gases and several nonreactive metals sitting around, watching the events unfold. Great question!

@evanweaver7373

6 жыл бұрын

You would get a lethal dose of radiation from the ultra-heavy elements.

@oron61

5 жыл бұрын

I bet the amounts of different compounds would change randomly each time you tried it. Say the Sodium and Chlorine hit each other first, started a reaction at a different temprature than a different salt would make, taking a little more or a little less time to start burning the Hydrogen and Oxygen together, making slightly more or less water available to reach with X Y and Z, etc etc. Set off an avalanche and see if the snow falls along the same path or not.

You guys have a fantastic channel! Thanks for all of the awesome uploads.

Great slo-mo Brady. This was a fun one and I look forward to all the new ones. Thinking about that T shirt too.

Very well done! Love the slow-motion videos. Keep up the great work!

Colorful reactions are great and explosive ones are even better. When you have both at once its entertaining as well as interesting. Good video. Keep up the good work gentlemen.

That... was... AWESOME! Now I can finally say that I have a single favorite Periodicvideos video.

Best slow motion reaction so far. Especially the purplish light near the end of the reaction.

Its nice to see some youtubers who dont play games not saying im against it

This guy is science, not a human, just science

@Bachvent

5 жыл бұрын

That's untrue, he is one of the most human, straightforward and keen science vulgariser i've never seen

@thesbubster

4 жыл бұрын

asdafafsadf

Best one yet! Loving this series! :)

These videos are amazing. Thanks. What did this sound like? It would be nice to see this at the end of the video in real time and sound.

Beautiful! Thanks for the lovely explanation, Prof. Poliakoff.

i love the play-by-play! this is a great way to do chemistry vids.

probably the prettiest video you've done yet

this video is so beautiful. it's astonishing. even Neil smiled, that's how beautiful it was.

at 3:21 I can see a flash on the right side of the container. In the next frame I can see the tip of the tube shoot up out of the container until frame 3:25 when it begins to descend back into the container to explode again. It looks like what's happening is that the tube drops into the container, rockets around the container in a series of three explosions, then drops back into the container to keep exploding from the exposed end.

Wait, is that Destin at 5:37?

@joshuarosen6242

8 жыл бұрын

I wondered exactly the same thing. It certainly looks like him.

@flagmuffin1221

8 жыл бұрын

It is indeed him.

@GodlikeIridium

7 жыл бұрын

Moldredmalco Yes it is destin. I guess he brought his hispeed camera.

@lbi3447

6 жыл бұрын

Yes it is. Search smarter every day periodic videos

@XavierBetoN

3 жыл бұрын

I wondered the same thing, Prolly he brought the hifps cam.. seed if you know his video of the article! I couldn't find

Once again by pure chance a superior experiment/display is produced! (KMnO4 reaction) Top marks! Loved the addition of an indicator to the trough. Can't wait till the next slow-mo video!

The addition of the slow motion camera make these videos better, but the step by step explanation by the Professor, ramped the "cool science" factor up by an order of magnitude

Spectacular slow motion reaction❣ 👀 I love watching videos like this. Thank you Professor P. 💝

I obsessed with chemistry since I was 12 (year 1990). My time of glory for chemistry started in 1992 when I was 14. At that time, I have to learn chemistry through limited old school books. I never imagine would own a computer, let alone internet connection. Now, everything is on top of my palm and tip of my fingers.

I was waiting for this. Thanks Brady!

This is one of the best and most fascinating videos made so far. Big grin on my face the entire time :D

This reaction is gorgeous! Just a couple questions, is the violet light some sort of plasma? And how hot do the materials get during this reaction?

One of the very small things I appreciate about when the prof explains something is that he never says "this is what happened" unless he knows for sure, if he's drawing conclusions he states before hand that "What i think what happened was..." and gives an educated guess. He's most likely right and probably has a pretty good idea he is right, but just for the off chance he isn't he makes sure we know it's his opinion

You guys are amazing. I would love to grow up and know as much about chemistry as you all do.

Regarding the emission of light--do you think it's the visible spectrum, or possibly partially UV or IR? In my cameras, the sensitivity of the CCDs encompasses more than the visible spectra, it also includes some UV and IR. One way to test this is to point the camera at a hot object emitting heat but not visible light and see if that is recorded as a visible glow on video.

This looks amazing!!

this time we need to thanks Neil! for the hard work!

If you look closely you can see the intact bottom of the ampule shoot round counterclockwise and then launch up and out of the container before hitting the backdrop towards the right site and falling back in. This is why you see two distinct sets of reactions. The airborne ampule can be seen fairly clearly when the prof is explaining the purple/lilac emissions.

Just what I was looking to see - thanks for posting.

This is one of the best alkali metal reactions I have ever seen. Not the kind of thing to attempt in a glass trough, I think - is the plastic one made out of a bottle from a chilled water dispenser?

i love watching these videos (i dont know much but its still neat!)

Best slow motion reaction yet!

please do more videos containing the actual reaction formula i loved it!!!!

I love the protective side panels on the glasses!!!

Great as always. I just wish there was more sound of the reaction.

I was surprised on the speed that the entire water supply turned.An even higher speed camera would have been nice to see the propagation.Great as always

Those flashes of violet rubidium vapour. Sooo BEAUTIFUL

excellent video, and great descriptions! also Neil is a legend!

I'm glad your "small metallic collider" (aka, the anti-climax machine) worked out much better this time. That looked amazing! Would have been good to be able to see what was going on under the waterline. Maybe from below as others have suggested. (not easy though)

great video guys!!

I love the way they used the same video (uploaded in youtube) to explain the reaction in the video. More likable was the soothing music while the violent reaction was taking. :D

There is no need for a reaction control system, nor even the rounded bottom. All directions the ball of metal can take will ultimately end up on the radius in rough or smooth motion about the center. The blob of metals appears to make around 2 rough circuits of the tub perimeter and each time slag is removed the reaction speeds to a burst and the blob moves on with renewed momentum.

i noticed something. When looking at it very closely i saw that the thing was flexing (as you said) And that the flexing caused some of the liquid to shoot out the middle.

I agree with AuraStudios,I'd love to see it in a dark room.I agree with the concept of the reaction within the tube possibly causing the multiple reactions.I also think each reaction propelled the tube around the rim of the tub like a model rocket engine,or like a teher car on a string.Quite spectacular and beautiful.Do you think the emitted light would have the same color if it weren't for the Phenolphthalein?

Everyone needs to see this!

Awesome Video.

Rubidium is most reactive metal in a periodic table if we don't care about Caesium or Francium.He has explosive strength of strong TNT.

One quick question about the reaction, what does the "smoke" that results from the reaction of the Rubidium and water consist of?

I've seen images around of heated mercury thiocyanate, any chance we could get a video about what goes on with that reaction?

The blue fire blowing through the pink water and mist looks incredible

The really interesting part of this reaction is that not only does the Rubidium go off in stages, but like the Professor said, each time the water rushes down the remaining tube of the Ampule and reacts with another piece, the remaining Ampule also gets pushed around the container, like an engine that's being 'pushed' forward by focusing repeated explosions out of a nozzle like one of those early 'thrust powered by atomic bombs' rockets from Project Orion.

Thank you for this explosion video. This is exactly the kind that entertains my young children.

Chemistry is a bit of a mystery to me (as a social scientist), but these videos are most informative and entertaining. It also looks fun! Thanks :)))

neil is the mvp of periodic videos

That violet color of the rubidium was very nice. You should do more slow motion videos.

Ok, so we need en even faster camera for this one. Awesome reaction!

So did the rubidium combine with pheline? (I don't know how to spell the indicator) Would they chemically combine if left alone? And do you try to recollect the rubidium from the water afterwards, or just "let it down the drain?"

its interesting that the reaction repeated in the manner you describe it, i would imagine the violent reaction would break the remaining intact section of the tube and expose the rest of the rubidium to water. given the fact its so powerful it even managed to violently bend the plastic container when it reacted,

Another awesome video :D

Love it! Keep up the good work....

Hey Brady, do you take request for a video reaction? I mean my brother and me made a smokebomb(...) and when he put to much sugar into it, it made like carbonfoam or something. We used KNO3 and sugar(don't know which variety, any will do) Anyway, great video as always and keep up the good work!

Just curious, is that bluish/violet light emitted from the reaction some sort of plasma? It looked like an experiment I saw of grapes being subjected to microwaves which created a similar light and was said it was actually plasma. Can you actually tell, or measure if its plasma? Love your videos and keep 'em coming. You guys are awesome

i think it would be very interesting to see the reaction also in the original time. or maybe you could mention how much slower you showed it in the video, just to get a feeling for the actual speed of the whole thing.

It would be cool to see this with a different indicator. Perhaps a green or yellow indicator (under basic conditions) so that the purple light would be more visible. It could be used to follow the trajectory of the bulk of the rubidium. You could also perhaps better map the timing of the purple light, and the flexing of the bowl using this as well.

5:38, is that Destin from "Smarter Every Day" there? How come?

You keep me motivated :)

Indeed - thanks Neil!

Look at that beautiful coloured flame!

this is an amazing channel!!!

one thing only slightly touched on is that, because the ampule bottom is largely intact and rounded; the reaction applies force all to one side of the rubidium mass, with the opposite side being able to move through the water quite easily. If you look closely just after the first reaction you can kindof see a trail of bubbles shoot across the front of the tank before the second reaction. In effect, they've made the world's smallest torpedo. Now we just need a tiny reaction based control system.

Phenolphthalein is my favourite indicator! I just love saying the "phth" part.... phthalein.... mmmm... diphthong..... naphthalene... phthesis.... :D

@helterskelter416

3 жыл бұрын

change your name to phteven

@asgkllngfxxhkkvxdhkkbhjllnvcg

3 жыл бұрын

@@helterskelter416 genius

when the rubidium gives off the lilac colored light, why is the light lilac... you mentioned that the solution is red because it absorbed all other colors but reflects red but what happens when light is its source... is the air around it absorbing all other colors but reflecting this lilac color or is it the light wave that it is producing?

This is just SO wicked!!!

Great video! Did you see my comment about using gold in the atmosphere?

Love the color, thru and thru

at 3:20 look to the far right for like 2 seconds what is that white flash?

Will the Lilac emission of light be plasma or not? just wondering.

Yeah faster camera and this experiment again would be awesome I thought I saw a whole chain reaction thing going on around the bottom from left to right of the tub with at least 7 or 8 explosions. that vapor light emission was cool to see too.

If you used a glass trough would it break?

Woot 2100 like! This video was very interesting! Can't wait for more!

If you ever get a chance to use a high-speed camera again, perhaps you could use LEDs for the lights rather than hot incandescent lights so you won't have the melting/spray issue with the reactive metals?

the reaction of rubidium with water produces hydrogen and rubidium hydroxide. the phenolphthalein indicator then reacts with the hydroxide produced in the original reaction to create water and the pink phenolphthalein anion, so the indicator doesn't significantly change the reaction, it only adds pink (also, the concentration of phenolpthalein is probably in the parts per million range)

Brady, can we have a video with all the slow mo. vids and them at full speed?