Reaction - Aluminum Powder and 3M Potassium Hydroxide

[MrMantura]

Blue shirt has nice titties!

[99Chemicals]

I like rooms filled with hydrogen too, especialy when the teacher lights his ciggerate! DUMB!

Just neutralize it with chlorine.

[NinjaBearly]

Absolutely stupid. Shouldn't one at least TRY to figure out what gas might be produced before performing the reaction? Use a fume hood. DUH!

[JakeXVX]

Ever heard of a fume hood? Its common lab procedure

[nickalisse1]

10 words to the teacher : Answer the dawn question, when your student is asking one!

Is it ammonia, is it ammonia?? Maybe I should ask the wall?? he'll probably answer me faster!

[MegaMoonlight1990]

You weren't supposed to put that much alcohol, after the first time, it was enough.

[witherspoon1995]

How would you get ammonia (NH3) out of KOH + Al ?!? Spontaneous nitrogen ftw

[tuipale]

i got only 2 words! teacher sucks.

[oneofusall]

@tuipale Yep! looks really dangerous...

[TheHomeScienctist]

it is H [hydrogen] and the black stuff is carbon and something els

[rjskt59]

Where does she get the idea it could be ammonia? Do you see an 'N' in Al or KOH? If I were the teacher I would have tossed a match in that beaker.

[diztortionmatt69]

Is it Ammonia? Is it Ammonia.... Is it Ammonia??

[progamerxt]

sometimes i wish i took chemistry in highschool =(

[tpseat]

This reaction should be done under a fume hood even though hydrogen gas isn't too dangerous in small quantities. A fume hood will prevent coughing which could result in accidents. As for a lab coat if you want you can ware one KOH is corrosive so you might not want to get it on your cloths if you like them.

[jene13203]

Can anyone tell me why the hydrogen gas would release slowly when KOH is added initially and then evolve more rapidly? Im stumped on my lab for this. Thanks for any help.

[starshock01]

cause as the hydroxide reacts with the aluminum, it first reacts with the outer coat, the oxide, which is slightly resistant to basic solutions, but very reactive to acidic ones, so when the oxide is gone the reaction occurs and hastens due to the exothermic reaction

[Mrluisao17]

@starshock01

and because of the temperature.i thinks the more hot it gets the more it helps the reaction but yeah you are rigth too

[derkozten]

The answer lies on temperature. At the beginning, reaction is at low temperature, so hydrogen releases relatively slow; as the reaction goes further, and it's exothermic, it releases mor energy, and that energy "pushes up" the hydrogen formation rate.

Simple reaction kinetics moral: the hotter, the faster.

[freakin1random]

it gets hoter.

[WinninGuy]

This is SO dangerous! How are you allowed to do these reactions without a lab coat?!?! And like mentioned before NOT under a fume hood!

...at least they're wearing gloves.

Also, swirling (not shaking) will be more effective in an Erlenmyer.

[swingyoureyeinthego]

I hoping your being sarcastic

[jessiebm123]

Ammonia!!!!!!! What that kid acts like he knows all i mean come on dude there is not one nitrogen atom in the stociometry AT ALL dude you need to lay off chemistry!!!!!!

[j822bosh]

The gas is hydrogen. The black crud is either atomized aluminum or trace metal from the aluminum like copper, iron, manganese. etc

[ScottRyan666]

The product is a tetrahydroxoaluminate (III) ion and hydrogen gas.

[javoangel]

The smoke it creates is really toxic!

The "right" way to do this is UNDER a FUME HOOD!

[benzster01]

should be under a hood!

[potassiumperchlorate]

HCl is an acid, not a base.

OH- reacts with Al creating H2 and (Na)3AlO3 The last salt is unstable and reacts with water forming OH- and Al2O3.

[RicardoGarciaPino]

You can bet thats hydrogen being produced. Like using clorhidric acid, even if this one is an alkali... Al reacts with the OH and the K then extracts OH by itself from water relasing H.