5:28 has to be the sexiest slow motion video I've ever seen.

@periodicvideos

7 жыл бұрын

In the next hour or two I'll be uploading all the raw slow motion (nearly 20 minutes worth!) from this video - it is very beautiful and I didn't want to waste it.... Setting it to some nice music... It will be on my extras channel here: kzread.info

@Malfunct1onM1ke

7 жыл бұрын

D.Litt Brady Haran knows his profession.

@DodgeWatt

7 жыл бұрын

Ohhh can't wait!

@periodicvideos

7 жыл бұрын

Here it is: kzread.info/dash/bejne/qpxtlaWgctW0dKg.html

@dutchglorygs

7 жыл бұрын

absolute ledgend you are!

5:00 In case you're wondering: yes, "a reasonable amount" is an official SI unit.

@Quintinohthree

7 жыл бұрын

Mohamed Haythem Limam Catalysts right?

@ficolas2

7 жыл бұрын

Penny Lane for catalysts it sounds... reasonable

@theRealPlaidRabbit

7 жыл бұрын

It's equal to about 0.1 Buttloads or 0.001 Shedloads.

@2Cerealbox

7 жыл бұрын

It's exactly 10 SI smidgens.

@slikrx

7 жыл бұрын

I thought it was 3.14 smidgeons per dash?

"Benzaldehyde has a very nice smell of almonds, but it's also slightly toxic."

@captainxemo3804

7 жыл бұрын

The best of both.

@yaldabaoth2

7 жыл бұрын

Vanillin is a similar but much better compound. I have some in my lab, just to sniff it from time to time, lol!

@Quintinohthree

6 жыл бұрын

Yaldabaoth Chemplayer seemingly tries to substitute vanillin for benzaldehyde in every possible reaction.

@NickC_222

4 жыл бұрын

Just slightly lol.

@ericpraline

4 жыл бұрын

Famous last words ;-)

*BAM BAM BAM* “This compound is not excessively shock sensitive” This is gold

When I saw the title I thought the "Brady" it was referring to was Periodic Videos' Brady.

@mattlogue1300

2 жыл бұрын

Me too

We used it A level in solid form. Many years later, when I was teaching at the same school, we received a missive from Herts CC containing a list of all the chemicals we were not allowed to have. 2,4 DNP was on the list. We checked, yes we had them all and and on the orders of the headmaster we kept the chemicals and binned the list. The head was a chemist.

@NickC_222

4 жыл бұрын

Maybe they were telling you you're not allowed to have 2,4-dinitrophenol, the potentially fatal weight loss additive lol.

I expected at least a little explosion.. This video is classic Parker square .

@thorsteinj

7 жыл бұрын

Intellllect agreed. Should one conclude that there are some similarities between a Parker Square and Brady's Reagent?

@Tfin

7 жыл бұрын

Was that just a very small reaction during the second hammering?

@munjee2

6 жыл бұрын

Intellllect Parker expectations

@YouTubeNazi

4 жыл бұрын

Try doing this with TATP 😎

Make more videos with this guy! I really like his style.

@gastonbell108

5 жыл бұрын

I like him. He's smart, well-spoken, a bit crusty, and rather odd looking: like half a Martyn. He's also the only other guy in the lab with those sweet side covers for his eyeglasses.

8:40 _"You better not damage these..."_ - Neil

@Eliphas_Leary

7 жыл бұрын

I'm sure he said "stay out of my territory!"

@FlawedbyDesign777

7 жыл бұрын

The36th He's bidding his farewells.

@Brainstorm4300

7 жыл бұрын

The36th what are you doing with my gloves? Okay, sorry. I'm taking them off, don't hurt me.

Had the pleasure of being shown around the department at Nottingham by Professor Woodward, and he was genuinely so friendly and his enthusiasm for teaching and chemistry in general was so evident! Makes me somewhat regret not choosing UoN in the end

Is anyone surprised that Niel rides a motorcycle? He's the Chuck Norris of chemistry.

@Halinspark

7 жыл бұрын

nettles89 Stig. The Stig of chemistry.

@jonahholmes6777

7 жыл бұрын

Stig's a car guy.

@melody3741

7 жыл бұрын

Jonah Holmes and niel is a chemistry guy. the analogy holds

@58209

4 жыл бұрын

in the liquid nitrogen video neil can be seen wearing some very nice leather pants

Next Video: 14 lbs sledgehammer vs dustbin of this stuff

@solstice2318

3 жыл бұрын

Unfortunately the camera was destroyed by the explosion and we couldn find the memory card in the building's rubble. Though at least we now have a confirmation of the "runaway reaction " risk of the compound when stocked in a dustbin.

@estellevanstaden5883

2 жыл бұрын

@@solstice2318 hehehe

Martyn Poliakoff looks very different this episode. very interesting!

@ronaldderooij1774

7 жыл бұрын

It is all Neil. He has quantummechanical properties.

@aparnavellala624

3 жыл бұрын

Because Martyn Poliakoff does not appear in this episode!

@Alex-bi5rz

3 жыл бұрын

@@aparnavellala624 r/wooooosh

@shosty575

3 жыл бұрын

@@aparnavellala624 r/whoosh

An interesting compound and video. It reminded me of a similar compound that is also shock sensitive when dry - picric acid. It still has a number of uses and must be treated with care. It was also found in the back of some school chemistry laboratory cupboards and had to be removed by bomb squads, especially if dried crystals were seen round the cap. I would like to see if a Periodic Video could be made of it. It would draw attention to its dangers as there still may be bottles of it in hidden corners where the uninitiated could have access to it.

"This compound is not excessively shock-sensitive." Science! :D

@TheGayestPersononYouTube

7 жыл бұрын

Penny Lane excess is subjective. My heart goes out to all the miners that had to use picric acid for clearing rocks.

@Mrdudeman

7 жыл бұрын

The Gayest Person on KZread Isn't picric acid only shock sensitive when in contact with certain metals, and it forms very sensative picrates?

@TheGayestPersononYouTube

7 жыл бұрын

Mrdudeman if I remember correctly yes but you have to take into consideration the low quality standards some companies might have used to synthesize it or the imperfect storage of said chemicals by the mining company. Also include stupidity of some of the miners and you have a recipie for disaster

@Edgewalker001

7 жыл бұрын

Concentrated picric acid is used in histology to increace the acidity of tissue samples and allow certain negatively charged pigments to bond with internal cell structures. Someone had left a bottle of waste reagents, probably contaminated with metal salts inside a reagent cabinet before going home from work one weekend. That cabinet no longer exists... =p

I was totally expecting Brady to be a part of this somehow

Finally Brady's reagent featured on a Brady Haran video

I really like Prof Simon! A consummate pro but not shy of making the chemistry approachable, and also very entertaining.

We NEED more videos with Professor Woodward! Something about talking about having a cup of tea while doing chemistry experiments is just hilarious to me.

In the world of shock sensitive compounds, actual macroscopic shape plays an important role. Larger, more uniform crystal usually means more sensitivity. If a bottle full of solution or slush slowly dries out over several years or even decades, very big crystals can form. As with picric acid, big crystals are scary stuff but it's rarely something you need a bomb squad for. It's just like with small mercury spills or when you find an asbestos mat in the cupboard - lots of companies out there that lobbied for the local laws to become insane for them to make money. No need for that.

This is great. It's like being back in my chemistry class listening to a lecture. :D

This experimenter is great and sounds very experienced. Someone worthy of Christmas Lectures!

Interesting and educational - at least to me. Need more of these kinds of videos that really teach! MORE MORE MORE

was half expecting them to cut to footage of a mushroom cloud or do a jojo's bizarre adventure to be continued right before the hammer strike

for 1mil can neil do a QnA

@mikekuppen6256

7 жыл бұрын

I´m happy to look at him with his mouth closed as well, but a Q&A would be awesome.

@EQuivalentTube2

7 жыл бұрын

And the whole while it'd be him looking unblinkingly at the camera and occasionally laughing evilly at the audience's questions.

@ragnkja

7 жыл бұрын

Zeppelin Conquistador I suspect Neil dislikes the sound of his recorded voice, but if it's just an interview with Neil he doesn't need to watch the resulting video because he'll already know all that is said in it.

@ronaldderooij1774

7 жыл бұрын

No, he can't talk. It is known that he once spat out the senctence "I am gonne throw this into the bunsen burner." But that is highly speculative. Some say, the whole lab had to be evacuated because of sulphuric fumes after he spoke.

@MephLeo

7 жыл бұрын

Yes, and the answers for all questions will be a silent, quite severe stare.

What a pleasant surprise, some actual chemistry on periodic videos!

@DavidWorley94

7 жыл бұрын

Dude, they did a video for every element on the Periodic Table - I don't know how you could do any more for the sake of Chemistry on KZread...

@Bigcubefan

7 жыл бұрын

Chemistry is not so much about properties of the elements themselves, but rather on their behavior in combination with other elements in molecules and reactions/transformations of those.

@annelieseocallaghan801

6 жыл бұрын

They have done hundreds of videos like that.

@christopherhall5361

6 жыл бұрын

chemistry is the "study" of matter and it's interactions, you don't need to react chemicals to do "actual chemistry," if you do as little as measure it's mass and volume, you've done actual chemistry

I really like this mans presentation style

Excellent video. Personality on par. You guys get to have a lot of fun.

I love Neil's poker face. Is he so intense whit friends or is he just a great professional who knows chemistry is a serious business?

was just studying about this very substance ... such a right timing u have!!!

I like this guy. Clear and concise and explains every step. Fantastic

I like the depth of chemistry touched on in this video.

Very well spoken, both clear and articulate

Yay! Finally! I was hoping for that video to happen!

Hey! (: i love that there is again a video about a chemical and how it was used/ is used. Videos like this are the reason this channel was awesome in the first place (: keep these videos comming! Thank you very much for the entertainment! (:

I could watch these chemistry videos with reactions and experiments all day. sadly youtube has a lack of these and I exhausted the supply several months back and video producers make new ones too slow ;)

I like this guy a lot, hope hes in more of the new videos.

Neil makes every video better, even when he's not directly in them.

@hank7281

7 жыл бұрын

OH SNAP! HE'S ACTUALLY IN IT! EVEN BETTER!

yay, an upload+!

the ending just... ahhh, had a tear. so funny

And again a great video of you guys!! I´m in my 3rd Semester in Chemistry and I totally enjoy watching your videos while eating or smth.. I just feel like I was productive for my studies, while just casually browsing KZread. Allthough, having more videos on organic compounds would be very interesting, as those also play an extremly huge role in modern society, health care, etc. Surely Prof. Poliakoff isn´t an organic chemist, but the other chemists, like Prof. Woodward in that one, or Dr. Stockman and Dr. Tang in the video on caffeine also do a great job. So keep on goingand thanks for your work and perhaps show us some more on organic compounds. :D

A good follow up classification test to the Brady’s reagent would be the Tollen’s Test. I think that would be another interesting video

very nicely presented

we used this in analytical chemistry to identify unknown compounds, and I was doing research for the paper, so happy that I can watch this and not read some boring pager.

The overstated reputation for explosion demonstrated in this video reminds me of an old Cody's lab video about adding water to concentrated acid.

Good video

this chemist is great to listen to! a little more advanced terminology, yet fascinating anyway for laymen (me and probably 90,000 other subs)

I like this guy. I hope we'll see him again.

Thanks for use of the gloves, Neil!

The reagent is usually used to differentiate between carbonyl compounds. The iodoform test, fehlings test, and tollens test are all used to differentiate carbonyl compounds. Wanted to put this because there wasn't a single intelligible comment here. Everyone talking about explosions.

This should've been the very first video of Periodic Videos

Probably unrelated to this video, but I've been vaping to rid myself of a smoking habit, and I'd love to see Periodic Videos do a video on the chemistry of Lithium-Ion Batteries, as an educational primer in the safety of said batteries. Also a chemists version of why venting/thermal runaway happens, and how to prevent it would be amazing!

Hey, thank you for the video! Could you tell me what the painting at about 0:40 (the coloured one) is called and who painted it? I really like it! Greetings.

I like this new guy

@JayMark2049

7 жыл бұрын

He's not new. Just hasn't been there too often.

The mastering of the physical universe by humans, especially chemistry, is truly remarkable!

"Benzaldehyde has a very nice smell of almonds, but it's slightly toxic... not *super* toxic..." lol sounds like something Wheatley would say in Portal 2

DNPH is still used for HPLC-UV Determination of Ketones and Aldehydes (There's an ISO norm for that). I remember the handbook of chemistry, where you had huge tables with ketones/aldehydes and their boiling point and their DNPH derivative melting for identification of unknowns. Also benzoylchloride derivatives for alcohols etc. Easy ways to identify pure unknowns. But today we have NMR for this and GC-MS and LC-MS for that and identification of unknows in mixtures. In the past they had to isolate the compounds before identifying them with a derivatives melting point.

Been hearing the name 2,4-DNP in my organic chemistry class for over a year now without knowing what it is and today after watching this video is when I realize what it actually does

That apparatus is the hammer of knowledge.

Random question: do you have a make/model for the air "gun" hanging off the fume hood door in this (and other) videos?

I like this guy, feature him in more videos

Organic chemistry! So exciting! :D

You guys know NileRed?

@Metalhammer1993

7 жыл бұрын

did Nile make it? moust have missed it. (i think he has one of the best YT-chemistry channels)

@Quintinohthree

7 жыл бұрын

Metalhammer1993 I don't think he has, but he has certainly made the related phenylhydrazine which is sometimes used for the same purpose.

@photonicpizza1466

7 жыл бұрын

I don't think he made a video on this. He made videos on phenylhydrazine, which can be a precursor of this chemical, and on benzaldehyde.

@Metalhammer1993

7 жыл бұрын

i knew phenyl hydrazine i jhust thought maybe he nitrated it^^ you know he likes using stuff he made reviously. but as it´s neither a drug and nobody noticed it stinks why would he make it^^

@benzenering2183

7 жыл бұрын

SeriousGamingDE yea. Nile Red is probably one of my favorite channels.

4:03 ''it should come out as a bright orange solution'' - fcking green. lol.

Very nice video! Perhaps it is interesting to explain the term "stoichiometric".

I have a question Make some tiny alluminiun foil strips and mik them with a drop of liquid gallium until you have some silvery paste if you put it in water it wil produce hydrogen but what will happen if you put it in different sodas ( coca cola 7up and maybe orange juice ) i'am pretty curios Sorry for my bad english

No Explosions? Can you make a vid about silver fulminate? Plz?

I'm wondering if humidity has a factor. Some schools have HVAC systems that produce relatively humid air while others relatively dry air.

Add neil.. Clearly you can see that the lack of neil was the reason why the compound did not react. btw please explain MOL thx. Excellent effort btw, and a super stand-in for the professor!! Excellent explanation in all!

Hi Brady I have a question. What happened of the Sixty Symbols Ogden Fellowship ?

amazing amazing amazinnnnnnnggggggggggg. I LOVE THIS CHANNEL ^^

I'm still waiting for the explosion.

You guys should do a video on Perchloric Acid, if you can. I know its incredibly dangerous so its very fascinating. Keep making great videos!!

Oh man, the CC is remarkable. How shock sensitive are "ladies regions" when wet?...

Used to make up gallons of the stuff ( well litres) as the Hydrochloride for the organic chemistry module at the local Poly back in the day.

I've used 2,4-DNPH (in solution) at school as part of my A-level, it's completely safe when wet.

@seigeengine

7 жыл бұрын

"Completely safe when wet." ;)

@johnallardyce4164

7 жыл бұрын

"safe" is a relative term.

@adityakhanna113

7 жыл бұрын

Exactly. We use it a lot in organic analysis

DNP is usually used to denote the thermogenic 2,4-Dinitrophenol, probably better to use DNPH for the phenylhydrazine.

I wonder how alike this compound is to 2,4-DNP, the pharma drug used (misused) for rapid weight loss?

Why do things that smell or taste of almonds kill you?

9:11 This could be right out of Look Around You

@aleksandrsokolov5449

7 жыл бұрын

I'm sure that was unintended

@LeoMRogers

7 жыл бұрын

"This compound is not excessively shock sensitive... write that down in your copybook now"

benzaldehyde and cinnamaldehyde are my 2 favorite compounds for obvious reasons

I just used this in my chem lab yesterday.

this compound also caused trouble in our school lab!!

You should have used the Small Metallic Collider.

"that's where all the fun and games start" remark of the day for me ^_^

@rick5078

6 жыл бұрын

3:10 who said science wasn't sexy ^_^ just listen to that sexy way of saying explosion rawrrr ^_^ hahahahaha

So there must be some precedent for why this compound is thought to be explosive. Anyone know why?

Dissolving a solid to obtain a solid makes perfect sense.

@ 4:09 The solution appeared to be green on the video. Why was this the case?

And what about auto-catalytic decomposition? I mean the substance was tested for shock sensitivity. But what about just heating it and see this auto-catalytic reaction?

Yay! Organic chemistry!

how to do hydrolysis of ester using two concentration and velocity constant of reaction

3:05 the most elegant way of explaining an explosion

at 6:00 the name of the product is wrong.....its Benzaldehyde 2,4 - dinitrophenyl hydrazone

Currently in the OCR a level specification :)

You may want to look at the conditions in a container when transporting and on a shelf. What if the container was on a rickety chemistry department cart? Inside the container will have some aerated reagent mixed with air. Can you test this against your control in the hood? That is where I would investigate if I had a high speed camera.

no discussion on dnp's effects on the bodies atp production?

I have a video suggestion. I live in Swansea, Wales and in a small town called Clydach where, German-born Chemist, and Inventor of the Nickel Carbonyl Process erected a Purification Factory. I was told that Nickel Carbonyl is very toxic and very volatile. Could you do a video on this?

Please do the Brigg's Rauscher Oscillating Clock!

9:41 i wasn't planning to until you taught me about this

how is liquid air obtained and what are the gases evolved from it