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Author: Subject: What is the COOLEST reaction you've ever seen/done?
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[*] posted on 20-3-2014 at 15:16
What is the COOLEST reaction you've ever seen/done?


Just curious :D
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[*] posted on 20-3-2014 at 15:55


Mercury thiocyanate decomposition with heat, thermite (FeO and Al powder). So hard to choose between the two!
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[*] posted on 20-3-2014 at 16:02


Pouring water on burning magnesium granules in a nickel crucible. The nickel gives the fireball a green glow! :D
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[*] posted on 20-3-2014 at 16:44


Probably baking soda and vinegar.
Just kidding Im a newbie to chemistry so probably zinc/copper oxide thermite its colored green but the smoke is zinc oxide particles so you dont want to breathe that.




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[*] posted on 20-3-2014 at 17:00


BriggsRauchser oscillating iodine reaction (once using barium iodate which I may make a thread on) or some percipitation reactions such as such as FeCl3 and ferricyanides or Pb(NO3)2 and iodides.



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[*] posted on 20-3-2014 at 17:53


Magnesium burning in chlorine dioxide.



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[*] posted on 20-3-2014 at 17:58


Wouldn't that explode?



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[*] posted on 20-3-2014 at 18:19


Yes, most certainly. I have doubts he even made chlorine dioxide.. It detonates for no reason.



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[*] posted on 20-3-2014 at 19:31


Of course it exploded, that's why I said it's the coolest reaction I've ever done.
I filled a steel tube with a mixture of chlorine dioxide and chlorine, (probably made from sodium chlorite and chlorine, although I can't remember,) then I put a burning Mg ribbon in the pipe. Boom! it was quite scary but also fun.




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[*] posted on 20-3-2014 at 19:44


Just made brass pennies today - not exactly explosive, but very fun to see the color change - although my partner kept insisting we leave the pennies on the burner for far too long, so most of them were burnt... Got 1 or 2 good ones.



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[*] posted on 20-3-2014 at 20:02


I haven't done a whole lot of interesting reactions yet, although I do really like the NH4OH+CuCl2 reaction to produce Schweizer's Reagent. It's such a nice deep blue color and it's very satisfying to see, particularly when you combine the reactants together slowly!
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[*] posted on 20-3-2014 at 20:07


I did the barking dog reaction once....carbon disulphide burning in nitrogen monoxide. I have my students toss hot steel wool into jars of oxygen every year, too, which is fun.



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[*] posted on 20-3-2014 at 20:32


The iodine clock reaction or the dehydration of sucrose with H2SO4
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[*] posted on 21-3-2014 at 10:19


Burning solutions of metal salts in methanol is always fun to do. But one of the coolest reactions I've ever seen is the stepwise reduction of vanadium by zinc amalgam.

The best reaction of all time is the sudden explosion between hydroxylammonium and bromate. I seriously need to try this myself.

Dissolving gallium in aluminum and drenching the amalgam in water is quite fun.




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[*] posted on 22-3-2014 at 11:50


Well, I always thought that burning magnesium shavings inside a block of dry ice was pretty cool.

Other interesting ones to note would be adding granulated sugar to manganese heptoxide, which "crackles" with little puffs of flame and thick "smoke" of MnO2 (don't inhale it!), magnesium ribbon wrapped in teflon tape, and the numerous thermites (exotic thermites thread on this forum is an excellent resource on those).
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[*] posted on 22-3-2014 at 11:59


The coolest reactions I have performed are a boron thermite, the Briggs Rauchser oscillating iodine reaction, and the color change of neodymium chloride.



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[*] posted on 22-3-2014 at 12:06


Quote: Originally posted by packetforger  
Other interesting ones to note would be adding granulated sugar to manganese heptoxide, which "crackles" with little puffs of flame and thick "smoke" of MnO2 (don't inhale it!)....


I once made the mistake of trying to extract dimanganese heptoxide into dichloromethane- the reaction was similar (well, the billowing cloud of MnO2 was, at least).




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[*] posted on 22-3-2014 at 12:44


Quote: Originally posted by DraconicAcid  

I once made the mistake of trying to extract dimanganese heptoxide into dichloromethane- the reaction was similar (well, the billowing cloud of MnO2 was, at least).


Did you perchance make the mistake of breathing it in? I was not expecting the billowing cloud the first time, and not wearing a respirator/breathing protection. Sore throat for days :(
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[*] posted on 22-3-2014 at 13:37


The reaction of aluminum and sulfur to form aluminum sulfide is probably the least cool reaction I've done.

[Edited on 23-3-2014 by Cheddite Cheese]




As below, so above.
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[*] posted on 22-3-2014 at 16:06


Quote: Originally posted by packetforger  
Quote: Originally posted by DraconicAcid  

I once made the mistake of trying to extract dimanganese heptoxide into dichloromethane- the reaction was similar (well, the billowing cloud of MnO2 was, at least).


Did you perchance make the mistake of breathing it in? I was not expecting the billowing cloud the first time, and not wearing a respirator/breathing protection. Sore throat for days :(


No- this was at university, so I at least had it in the fume hood both times. (The first time was an accident; the second time was to show off.)




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[*] posted on 24-3-2014 at 02:12


Reaction of Mg KMnO4 and a little sulfur!very fast and exotermic(flash powder)
If you have not try this,then try with these amounts: 7gr KMnO4 and 2gr Mg powder and 1gr sulfur
The more smaller the particles,fater reaction occurs,use less amounts,0.7gr permangenate,0.2 gr magnesium and 0.1gr sulfur,use sunglasses it will be very bright,more than sunlight!!!

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[*] posted on 24-3-2014 at 04:33


Salt/ice is the coolest I have used at home. I hope to try CaCl2/ice sometime which supposedly gets down to -40C for use with a mercury diffusion pump that I bought.
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[*] posted on 24-3-2014 at 06:25


sasan - Permanganate flash is quite potent stuff, I would *not* advise mixing up big batches of it like that 10 gram batch. Still very cool stuff though, try iron powder and KMnO4, very very hot mix (sparks and hot fire, not "fast" like flash with my iron filings).

forgottenpassword - try a dry ice/acetone. Gets even colder than that :)
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[*] posted on 24-3-2014 at 06:36


I just found out that Walmart and Kroger has solid carbon dioxide. Not sure if you can get it, but it's quite easy to find, and much colder than ice water with a chloride salt.
[edit: typo]

[Edited on 24-3-2014 by Zyklonb]




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[*] posted on 24-3-2014 at 07:20


Oxidation of cyclohexanol to adipic acid using near-boiling nitric acid is also cool. Also a reaction to be done in the fume hood.



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