Traffic Lights - Periodic Table of Videos

[Hellsslave666]

I did this in school the other day :)

[Subparanon]

So what is happening exactly? I'm assuming the indigo is made from an iron oxide, and I know carmine is harvested from cochineal insects. The indigo I could see changing with PH but the carmine should be stable as it's a pigment. I'm guessing the oxygen causes the indigo to oxydize again, but then it is almost immediately reduced by the lye. What role does the sugar serve?

[gotohemp]

cool aid would make a fortune if they could do something like this

[docsharp00]

so cool :D

[gesamtszenario]

Did I just hear Neil... speak?

[gnfr211]

Amazing, thanks for the great upload!

[RightAboveAverage]

3:10. That tank is size Wombo.

[mcwario13]

Niel is a 48 year old pedophile

[wazscience]

i like how they called it the traffic light reaction, but in real life i wouldnt want my traffic lights changing like that...go...stop....caution...­lol

[GingleGangle1]

Liquid Oxygen is dark blue?

[Riotstarter100]

@GingleGangle1

liquid oxyqen is very light 'sky-like' blue

[GingleGangle1]

@Riotstarter100 and what is that dark thing?

[Riotstarter100]

@GingleGangle1

the dyes to colour the water

[Taconut7]

Is there a certain molarity you have to have the NaOH solution? Also does it matter how much sugar you use? (I plan on creating a design lab based off of this reaction)

[K333N3R]

Gotta love redox reactions..... Bitches love transition metals

[chuckles731]

there's a really awesome chemical reaction where you put some chemicals in a beaker on a stirring and heating machine and it changes colour back and forth on it's own

[ctfxcfangurl]

That's so awesome!

[820423]

i watched it again. its awesome.

[820423]

this one accually gave me a stroke of genuine childish awe. i feel silly and privileged at the same time.

[ozzygp11]

she turned smurf blood into pee D:!

[youngrudy16]

Bigboy 45454545 you are so lame if she talks that let her talk like that

[bigboy45454545]

What is this "wa-ta" you speak about? I've never heard of this solution before. It must be new :-)

[footballjay18]

@bigboy45454545 in jamacia the water bottles actually say "wata" and they will sometimes make fun of you if you pronounce the r

[grarosting]

MY BRITISHNESS IS FADING!

[AlphaKiloFive]

Neil is in fact agent 47 working on an undercover mission in order to recover secret files from an unknown mad scientist who escaped the Russian gulags during the cold war.

The content of those files is yet unknown, since they have been kept secret.

[johnnyk617]

what color does it make ur piss?

[andrewkiwi100]

I would have liked you to explain the chemistry behind the colour change.

[stalkersas]

that is the second moast undecided thing i've ever seen ! the first 1 still remains my room mate.

[mumiemonstret]

Beautiful. But where's the explanation?

[Robloxblacky]

0:20  Jarate!!!

[michalchik]

Would hydrogen peroxide work for the reversal?

[livedandletdie]

the scariest thing with this if you were on a party and said this liquid is magical watch it turn to blood as I empty the bottle.

[potion123456]

isnt that just universal indicator for pH?

[nichii492]

Can I know the explanation for this reaction?

[5000loto]

"so you've got larger particles~and the water's cold" If memory serves - the dissolution of sodium hydroxide in water is highly exothermic, so shouldn't it dissolve a bit more readily in cold water? I recall using an ice bath to speed up the dissolution of sodium and potassium hydroxide in lab...........

[x3na3]

would this work with any base and indicator? or should it be solid NaOH [we haave liquid]; we dont have indigo die either. any substitute?

[changminkeybum]

could anyone please tell me how this reaction works? maybe some of the chemical equations involved too? THANK YOU!

[glitenin]

WHAT SORCERY IS THIS?

[elflordbob1]

@glitenin

BURN THE WITCH

[vengance4life1]

@glitenin chemistry.

[coltononline]

Neil for President (or P.M.)...!

[Supermassively]

Traffic lights don't change from green to red to amber. Failure.

[Quintinohthree]

Maybe if you put pure oxygen in the big flask, you could contain it using a lighter gas like helium, and then pour in the liquid the reaction could be a bit more thorough and the solution could turn green again. I don't know if the experiment is even feasible though.

[DrEthre]

6 eyes p_p

[pyropakman]

@YoungRapper700 : Nurdrage, PeriodicVideos, ScienceMadness. Also, look up any online college-level General Chemistry Textbooks. Once you get through that, move onto an Organic Chemistry one. :D

[Ricalloo]

Witchcraft!

[RayTV100]

Does it changes the colour of blood?

[pooppeeyoupants]

thumbs up if you're watching this video and you are or is becoming a chemist!

[EnhanceTheTruth]

@pooppeeyoupants How do I "is becoming a chemist"

[joeeezy69]

@pooppeeyoupants I is becoming a chemist!

[vmelkon]

@joeeezy69 I is want that chemical!

[TheChemistryClub]

@pooppeeyoupants I is becoming a chemist!!!

[raydredX]

@pooppeeyoupants Although understandable I sometimes wonder why people prefer chemistry to physics.

[ModernGameChangers]

@raydredX Well some might say that Chemistry is just applied physics. Either way they are closely related. 

[MindSeeR666]

@pooppeeyoupants I'm hoping to become a physicist to be honest lol. I find this really interesting and Sixty Symbols.

[Seanze329]

@MindSeeR666 yeah physics here but I still love chemistry. :)

[Subparanon]

@pooppeeyoupants Thumbs up if you are not nor will you be a chemist but you find science entertaining and you can't stop learning about things because you are too curious about the world.

[boxkommentator]

dyke

[CommanderQ]

@YoungRapper700 University.

[onthecuttingedge2005]

Neil is M.I.B

[g4lt]

She just poured Lye down the sink?! While Lye is a decent drain cleaner, I'd suggest that it needs to go into the dump tank for proper disposal

[841067596]

That was awesome!

[Dbelenit]

why does this asian chick have an english accent

[constantlearn]

@Dbelenit people of asian decent can be born in England. Thats probably where the accent came from

[TehRainehKH]

I'm going to be demonstating this in front of the class and I'm not very good at chemistry. Can you use a regular indigo food dye instead of indigo carmine? Is there another dye that I can use?

Please, I need an answer. Sooner the better. Thanks :)

[from212]

I dont understand youtube. How is it that 720p almost always loads faster then 360p.

[SabretoothSnowMan]

How does this happen? Tell us the chemical process that occurs.

[1989Gez1989]

@SabretoothSnowMan

chemicalconnection[DOT]org.uk/­chemistry/experiments/list.php

indigo carmine reaction half way down on the right

[AnaMaclovia94]

How much of each substance is needed? I want to do it :D

[MrGuitarZeppelin]

how do stop lights work?

[FrozenHaxor2]

Neil is mysterious person, they should make a video all about him lol.

[TechnoMulen]

oh so DIZ is what happens in the traffic lights every time :O

[TomJamesPrice]

@TechnoMulen No.

[TheMusic2007]

I always wanted to do interesting side experiments like this in school but never got to in 2 years of chem (general and organic 1 year each).

[holymasteric]

i think we should keep that oxygen... we're gonna need it.

[nikhilesh1]

Would it turn back to green / blue if you added hydrochloric acid ?

[sa2uklost]

@nikhilesh1I I'm only a student but I reckon the basic NaOH reduces the glucose thus slightly increasing the H ion concentration in the solution and as the reaction proceeds the concentation increases a little more still(it changes colour fast becasue of the rection kinetics). They then reverse the reaction by adding oxygen to oxidise it again. I also think that it is blue is more basic conditions not acidic (indicator)-correct me if Im wrong...

[huntingvuk]

thanks,that's slick.

[aashish7kumar5]

dude. can't neil speak? is he really dumb or what?

[rogeryermaw]

@aashish7kumar5 no you are really dumb. neil is helping with chemical experiments. what are you doing?

[aashish7kumar5]

@rogeryermaw well i didn't mean it that way. i meant that why doesn't Neil speak in the whole series

[rogeryermaw]

@aashish7kumar5 actually if watch the entire series you will hear him speak. i can't recall which video but i have heard him speak. it is quite rare.

[Defonthana]

wow really cool reaction!!

[engelteir]

need to put it on a bit of paper to show the colours better.

[TranceMasterXXX]

Now drink that!

[YTR0009]

0:36... sodium hydrokide is an alkaline but y is it CORROSIVE?

[1986liberty21]

@YTR0009 It`s corrosive in a certain amounts



[YTR0009]

@1986liberty21 i mean, isnt acid supposed to be the one that is acidic? my school taught me thar sodium hydroxide, which is an alkaline, is supposed to be slippery (?)

[puncheex]

@YTR0009: an alkali can be as corrosive (to skin, or metal) as an acid can. They are opposite sides on the spectrum of chemical activity. Either one will ionize in water, and if needbe pull that water out of your skin and "burn' it. Alkaline materials in weak solutions feel slippery, just as soap or detergent feels; soap is, of course, made from an alkaline base.

[greeneyedgeek]

@puncheex acids will draw water, alkalis might as well, but the danger from alkalis is that saponification occurs, and the fat in the skin reacts with the base. An acid-base reaction occurs with the fatty acids, and they are separated from the glicerine molecule to for glicerine and a fatty acid salt (a.k.a. soap), that's why an NaOH solution feels slippery (even in diluted solutions)

[puncheex]

@greeneyedgeek: OK, thanks for the continuing education. I do know that alkalies will rip water molecules apart, just like acids do; burns are just as much a hazard as with acids. I guess they are, then, additionally hazardous due to their attack upon fats.

[MuneoPollen]

@YTR0009 It reacts with the fatty molecules in your skin (and deeper, if you leave it for longer) and breaks them up into soap-like molecules which dissolve in water. This includes the molecules that make up the walls of cells, so it's very destructive. In general, though, alkali catalyses many reactions which break up large molecules - for example, strong alkali will break up polyester and protein.

[SirJ26]

Cool, especially the reverse reaction when she pours yellow in and red comes out!

[zigec59]

When you shake it, the glucose binds oxygen (oxidation) and the solution gets green, when the solution is standing, the sudium hydroxide takes the oxygen, it reduces the solution so it turns firs red and then amber, if you shake it again, it all repeats.

[derickhaywood]

@zigec59 Heathen lies, this be witchcraft !!!

[DeltaPhi79]

What DOESN'T Neil have?? XD

[therandomexample]

@DeltaPhi79 A copy of the Higgs boso- oh, it's over there.

[DeltaPhi79]

@therandomexample LOL!

[SuperTechieJ]

Nobody ever showed this to me in primary school...

[TheSamages]

Neil "just happens to have a bottle of oxygen". LIES!!! Neil summons oxygen and it obeys. Neil eats Radium, exhales pure Fluorine and sweats solid Gold. When he presence, conflagrant high wind blow mother earth chaos, all biology became skeleton. Praise Neil.

[happyhayden11]

Chuck Norris+The Stig= Neil

[de0509]

@TheSamages Lol i know gold is quite soft but how do u sweat solids

[E2qNX8btraQ3zRD6J7fc]

@de0509 The solid would be dissolved in water the way sodium chloride (a solid) is dissolved in sweat.

[de0509]

@E2qNX8btraQ3zRD6J7fc oh i get it u mean very very diluted gold

[rogerdotlee]

@TheSamages Can he summon Chlorine Trifluoride like that? I understand that it can be a rather cantankerous compound when summoned and likely only Neil Himself can contain its rage.

[WaagooshTheRedFox]

@TheSamages PRAISE NEIL!

lol

[ecj314]

@periodicvideos I'd really appreciate it if you gave the weights and volumes of materials used...I've attempted this, and have never been able to get it to work. Thanks!

[kakitembak23]

interesting results

[genicide81]

We preform this demonstration at my school, we place the solution in a bottle with a good amount of air head space. Swirling the solution will turn it red, shaking it vigorously will turn the solution green. If anyone is interested in demonstration chemistry I would suggest checking out books by Bassam Z. Shakhashri. He has many experiments like this one with in-depth explanations of the processes involved.

[MediaNexus]

It's just like a real traffic light! ... never turns green again... :(

[ultimaplayer331]

FUCKING SCIENCE HOW DOES IT WORK???

[raymondo900]

Sweeeeeeeeeeeeeet =)

[MillardFillm0re]

god damn that is so weird... a british asian...

[157amir]

pee...

[Dazmaster75]

I want to know why, as a person with limited chemistry knowledge

[AnsemsApprentice]

Awesome. Now drink it... drink it drink it drink it!

[captwasabi]

Maybe this is how Jesus turned "water" into "wine"? Maybe he was just a chemist?

[GaoZhong12]

why is this video still remain the old video player? I mean it's better, 'cause I like the old video player, I just wonder why?

[TheHellz0r]

Sounds like a man =D

[trfccurt07]

Anyone notice the green tint as soon as it hits the bottom of the container when she pours it, its only there briefly but try and pause it

[Pr3d4t0R6sic6]

corrosive liquid disposed of into the sink?!?! enviromental services would be your best friends :) corroded drainage pipes, not a good example teachers!!!!

[AndrewThomasR]

@Pr3d4t0R6sic6 they usually have seperate sinks in chem labs, dude. Plus its pretty dilute anyway.

[KilgothMirna]

@Pr3d4t0R6sic6 This solution won't do a thing to metal pipes and in this concentration it won't harm plastic pipes either. It's also completely harmless to any lifeform on this planet once diluted.

[ebenbrooks]

Indigo *carmine*?!? I thought "carmine" was a shade of red.

[slyberspace]

Ok, that was cool :D

[mecemical]

That asian lady needs to smile more :c

[310BPM]

holy hell, that impressed me. wow.

[xSPARKLEfoolx]

lol it looks like wee XD

[moonlily27]

Why was this under cooking

[sexiw0lf]

@moonlily27 She used a sink

[moonlily27]

@sexiw0lf ahh

[cHiKaDiNg58]

TURN IT BACK TO GREEN!

[1989Gez1989]

@cHiKaDiNg58

too much glucose, or solution is too warm

[1993gandy]

did it say not for indoor use on that cylinder :L

[baddmanaz]

if the process is reversible, does it mean it was a physical (not a chemical) reaction?

[howtowakeakar]

Chemical reactions are reversible.

[CarnalDiafragma]

Wow that's really cool! I did it with potasium permanganate intead of indigocarmine, but that ins't reversible that way. This is way more awesome!

[Butandiolmonoacrylat]

could i take another stuff than indigocarmine?

i have here malachitegreenoxalate, eosine y, kongored, methylicviolet...

great video ;)

[chemiealex]

Really cool experiment!

But if you poor the liquid from a higher level into the other beaker, the liquid goes green, not only red!

Sorry for my English ;-)

[gina2467]

i dont get it

[ashoftomorrow]

this experiment has gay pride.

[Roerpues]

Needs more Neil.

[JOEinSD86]

what an annoying accent.

[gurlz8]

amazing!

[whoodiestyle]

siemens lmao what a dumb company ad name reminds me of sandy balls resort

[littlegoofys]

that's awesome

[nnytom]

yeah you should of kept it amber.. for amber lamps

[SuperFakeandGay]

MORE AMBER LAMPS PLZ!

[mattm172]

haha

[AZn5t0n3R]

siemens XD

[ZachAkaZach]

yea wtf another fail company if you ask me. ever been to the sandy balls resort? lmao

[WetDirtProductions]

@ZachAkaZach RWJ! hahahah

[pepcycool]

WE did this when i was in 2nd Grade

[homidog11]

everyone on youtube is so moody now

[ilubny]

BURN THE WITCH

[bakamesuinu]

witch

[Gutsyndicate]

Chemists are magicians

[miesrah12]

this is my favorite at home reaction

[Zahirsai]

Glucose in the presence of sodium hydroxide acts as a reducing agent, and actively reduces the dye, indigo carmine. Thus, its most oxidized state, indigo carmine is blue. In its most reduced state, the dye is yellow. As oxygen (an oxidizing agent) is bubbled through or mixed into it, it gets oxidized again but is quickly reduced again because the Gluc-NaOH mixture is in excess.

[Giiizmo]

The experience is worthless if you don't explain what's going on.

[user21XXL]

@darkdonkey147 glucose and sodium hydrokside shouldnt be a problem but that dye... glucose- ask in any shop with "normal" sugar. sodium hydrokside- ask for granulated pipe cleaning

[barophobia]

hydroxide

[zavatone]

"Hydrokside" does not exist. There is no K or S in hydroxide.  Oxide means "combined with oxygen" and there is no k or s in oxygen either.

[user21XXL]

sry stupid ctrl+c/ctrl+v mistake you are 100% right, and it was nice of you to explain the reaction

[darkdonkey147]

Is their anyway i can try this at home? like where can i get pure glucose and sodium hydroside,can normal people get it or is it not "avalible" to normal people?

[scilabo]

The question is: WHY?

[aeroscope]

but why doesn't it reverse back to green?

[damagon123]

As usual the green one lasts the least.

It's a conspiracy man.

[Joejonash]

beautiful

[wowggscrub]

id like to see A molecule video on OZONE (O3)