Accidental Reaction - Periodic Table of Videos 

These videos are made by Brady Haran - check out his "Unmade Podcast" here: bit.ly/UnmadePlaylist

The sign of a real chemist..."Who needs exact measurements? I'm going to just dump a bunch this into a bit of that..."

I love the baffled face of professor Poliakoff holding the empty bottle at the end: "I think I have found a new toy, got carried away while playing and now I have to explain the resulting mess". Scientists are children, aren't they?

"I once hit myself very hard on the nose while demonstrating this in the lecture..."

This strangely made me laugh so hard. He's so calm despite everything going wrong, I love optimism.

That story about putting permanganate in the fish tank is actually quite interesting. Potassium permanganate is actually used to treat protazoa infections in fish sometimes. :)

This has gone flat...I'll go get some of my own hydrogen peroxide! Made me laugh.

"Now I have to explain to the technicians why I used up the whole bottle of permanganate..." Lol!

I want this man to be my grandfather and professor... I want to be able to sit next to him at a fire, it snowing outside while he tells me different stories of his days.

The giddiness in his voice is lovely to witness as the experiment takes a surprising turn.

Isn't potassium permanganate used to treat several diseases fish can get, anyway? Sounds like Granddad knew a lot more about fish than he let on.

I just love the profs "WHOOSH!"

Be careful, the fine bros might sue over this reaction

It's these kind of accidents that's behind many of our great discoveries.

4:20 "That's pretty cool". That made me laugh! I absolutely love this guy. Obviously a great teacher, one that can explain what could be very boring technical data and make it exciting, understandable and interesting.

He works at a University REALLY close to where i live, hopefully one day i'll get to be in his class

I love it when a professor changes their perspective accidentally and gets an entirely new effect. I like the imagined explanation "I used the whole bottle because I found a reaction worth repeating several times.", this show is great! I love it.

This is one of the best moments on this channel possibly.

Still my favorite video from the professor, I've never seen a chemical reaction quite as entertaining or baffling before or since. I wonder what the technicians had to say for a whole bottle of potassium permanganate being used up?

The whole time he was pouring the permanganate potassium I was like "there goes your budget!"

honestly, that reaction is way better than the other way around. it practically looks like a camera trick, like you're pouring it, and then the footage is being reversed and its going back in the bottle.

I wish this guy was my intro to chem professor!! So calm and kind, perfect when things are going wrong during labs, or even tests lol

That guy looks exactly like a wizard..

I love the professor look at the end about explaining using the whole bottle 🍶 and really looking like it was a blast and totally worth it... And it totally was :) one thing i love is the passion and internal energy everyone has :) they give off the thrill and passion of doing what you love and being able to share it with other :) just simply makes me happy watching :) thank you!!!

I had a chemistry teacher who did something similar to the last bit to demonstrate the importance of keeping the equipment clean or it might mess up your experiment.

Now this is what I call chemistry not that thing in my school that teaches us the first 2 and a half years from the books and no mixing of chemicals whatsoever. (I personally learn a lot better when I see something doing something like in the video changing from purple to colorless, because that wakes up my interest in that sort of thing, and I almost immediately want to learn how that happened and why.) If only I've had a chemistry teacher like him...

The Professor is one of the best things about RU-vid. I love this guy 👍

You can see the joy on his face marking he hadn't seen this before, like a child. This isn't what I wanted to show you but it is better

I guess the equation is 2 KMnO4 + 3 H2SO4 + H2O2 → 2 MnSO4 + 4 H2O + K2SO4 + 3 O2 The Manganese in permanganate gets reduced from 7+ to 2+. The Hydrogen in H2O2 gets oxidized to 1+. #chemistry #man. #It #is #the #best.

Sometimes failure is better then success. :P

I would have loved to have this guy ,as my advanced Chemistry professor. He seems like such a neat ,and nice fellow , that is also a natural, when it comes to being a great teacher.

“I now have to explain to the technicians why I’ve used a whole bottle of permanganate solution”... Made me smile. Such a legend.

Shouldn't that Hydrogen Peroxide be stored in a dark, opaque container to keep the light from decomposing it faster?

Why couldn't we have done something like this in my school... If we did, I may have liked chemistry.

I love Professor, Martyn Poliakoff's child like glee at the new way this demonstration turns out. After all these years he is still fresh and excited about his work. A lesson and example for us all.

Always keep humour in the processes. Humour helps make it more memorable.

is that what happened to the profs hair? ^^

this is easy to do with medical-grade peroxide (3%), sodium hydrogen sulfate and permanganate, like in the video. I do it all the time to entertain my family.

The comment written before this is what I wanted to write exactly !! I hope the old man knows that his kindness is what makes him likable

2012: video is uploaded RU-vid in 2019: let’s put this in your suggested, you might like it

I think what really made the spectacle was showing us how purple it was when you started so the expectation was that the liquid would turn purple, and instead neutralized.

i like how he says WOOSSHHH every time

I actually _prefer_ the 'failed' chemical reaction followed by the empirical explanation of what was supposed to happen, then followed by a superior demonstration which includes additional information.

“You wouldn’t bleach your hair with this…might go up in smoke!” Gotta love the Professor! 😆

He's simply turning wine into water, nothing to worry about. WAIT ! :o

I'd like an explanation for why the color wouldn't disappear with a substantial pouring of H2O2, but DID disappear with only a small remnant of that very same H2O2.

I love your videos and teaching style professor. Please, never 🙏 stop ✋ learning and teaching to us.

I have very little education. that said, I find these videos to be educational and really really fun.thanx doctor. you made my evening.

Purple drank

😘“I‘m sorry the Atoms are all the same colour!“

Interesting video on peroxide. I take a trip down the memory lane some 35 years ago, when I saw a huge explosion with peroxide in Unilever Research laboratory, when I was handling this not so friendly reagent! But fortunately this has not sacred me from Chemistry, instead I did pursue a successful Research career till my recent retirement. Martyn's contribution via videos is immense to future chemist!! Looking forward to more from his team. Best wishes. Gopalan CChem FRSC

This man is so pure, he’s adorable.

potassium permanganate is used to treat sour crop in budgies.

The permanganate looks like a rocket engine flare. Strange.

5:38 this is why Periodic Videos is the best channel on RU-vid

I like how this guy just randomly talks about how he hurt his nose during his lecture while maintaining as serious tone explaining about the structure of the bonds

How do people discover such reactions? They just try different liquids and see if anything happens?

He's adorable

“I now have to explain to the technicians why I’ve used a whole bottle of permanganate solution” 😂 love this guy

Yo I love how chill this guy is

Can pure hydrogen dioxide set fire to the rain?

At this point, I want to attend this University!

The real reaction video, unlike the other boring ones where we see random people make weird noises and poses

We got to see this in science, we were using potassium permanganate to demonstrate convection and at the end Paul (the lab assistant) showed us how he neutralises it and disposes of it. Still one of my favourite things to see

Imagine Rowan Atkinson say "Potassium Permanganate".

"Woops, something cool happened." Chemistry, everyone. Although, sometimes, that changes to, "Woops, something awful happened." SCIENCE

Thanks for the feedback! I will look again.

Thank you youtube for randomly recommending this

I hope potassium permanganate is cheap

Do Brits not use dilute peroxide as an antiseptic? In the US that's probably more common than use as a hair bleach.

You folks have 471 videos (as of posting) that consist of pure knowledge condensed into a nice and digestible brain tablet. That is many hours of brain-growing knowledge, and many hours people won't see back. Totally worth it.

No, titration is used to determine an unknown concentration of a known analyte (Or 'Component' if that word suits you better) For example, Vitamin C, you can find it's concentration by adding a Redox titration like Dichlorophenolindophenol, which is a blue dye that will turn colorless when reduced by the Vitamin C. But that is just 1 of many forms of titration.

I like this teacher! :D

It confuses me why their Hydrogen peroxide is kept in a translucent white bottle, instead of an opaque brown bottle. That would keep it from decomposing longer wouldn't it?

I did enough chemistry to know exactly what was the experiment at the beginning of the video. In fact i have done this several time in different chemistry classes. I have to say its the best fail ever. Never saw it come. Great stuff, love your videos, keep em coming

Like a true scientist, he sets out to prove A and ends up discovering B. Very cool.

Haha I love this. Accidental discoveries. It's not magic, it's science! Wonderful stuff. :)

I wish this guy was my Prof

"Now I have to explain to the technicians why I've used the whole bottle of permanganate." -- classic!

Pretty facinating to watch. The world is full of surprises.

87 dislikes. wtf going on here

This is why I couldn't be a chemist. Too many possibilities! Even he didn't predict the outcome from just not washing the glass.

My chemistry teacher showed my class some of your viedeos and now I can't stop watching them😂...

Professor's accidental reaction: Cooler, colorful, educational, interesting My accidental reaction: bean burrito + mountain dew, two hours in a public bathroom, pain

Well, chemistry did originate from alchemy…so yes, that pretty much is magic! This is why I want to be a chemist. I would like to think that I'm a wizard.

looks like lean

Who ever knew you could have this much fun with pomegranate juice?

I. CANT. STOP. LEARNING.

I’m certain he taught me potions at Hogwarts following the precious master’s death.

I have learned more from the professor in three months of periodictableofvideos than three years if high school chem

Can't stop watching these videos. Seriously cool professor.

I love how pretty much improvised that H2O2 lecture

The Professor loves his work.

"I now have to explain to the technicians why I have used a whole bottle of permanganate solution"

This is a real prof. Would love to follow his lessons

I love his dry sense of humor, I'd really like to know this guy.

I so love his kind of humor, you wouldn't bleach your hear with this, it might go up in smoke lol.

we actually did something like this in my AP Chem class where we used the potassium permanganate in a titration and the color would dissapear into the solution almost instantly until we added enough for it to be titrated to a pink endpoint.. i love chemistry :)

This professor has the most calming and soothing voice in the world, i love watching him explain stuff ^_^

My chemistry teacher in high school once told a story of how someone stole a small bottle of Potassium Permanganate and emptied it into the school indoor swimming pool. The color of this compound is so strong that even the small bottle in the huge pool turned the whole thing bright pink-purple. The school was going to spend an enormous amount of money to have the pool emptied and cleaned, but he stopped them, ran down to the local pharmacy, bought all the vitamin C supplements they had, and dumped it into the pool. The vitamin C converts the permanganate to regular managanate, and the potassium salt is an insoluble brown solid, which precipitated out of the water and was vacuumed off the bottom of the pool with a regular, far less expensive cleaning.