Chemical Reaction creates O2

[Vinnie881]

There is a product out on the market use for a home Oxygen Bar (Like the O2 bars in hollywood), but with this product you mix Chemical A with Chemical B in water, and it produces large amounts of 95% pure oxygen.

 

Can someone help me figure out what chemical A and B are.

 

Thanks!

[insane_alien]

well, A+B producing oxygen really narrows it down. i mean theres only a few thousand possibilities. why don't you look at the box of one of these things it'll have to tell you the chemicals by law.

[Vinnie881]

That's the issue I do not have the packaging.

 

What 2 ingrediants mixed with water produce the highest amounts of 90-95% pure o2.

 

Any thoughts?

[pioneer]

The easiest is store bought peroxide (hydrogen peroxide) and any type of weak acid. One can use a drop of lemon juice in water for citric acid. If you prefer limes, oranges, strawberries, grapes, apples, almost any of these will work, and will also add a little fruit fragrance to the O2. They all contain any one, or a combination of, citric, maleic or lactic acids. I used to make fruits wines years ago, and these are also slightly acidic.

 

Here is the marketing slogan; Fruit-O2. Anyone is welcome to this idea. Who knows maybe someone can become the new O2 mogul. Don't drink or it will give you gas, simply smell it, for that O2 blast.

[Fuzzwood]

Another way is leading HOOH over a platinum or copper catalyst.

[Vinnie881]

Please keep in mind that you are talking to someone who barley passed chemistry.

 

I cannot seem to get the reaction to generate any indication of large amounts of o2.

 

 

Here's what I did.

 

I took 10 ml water with 4 drops of lime, and 10 ml of Peroxide in a cylinder, then sealed immediately with a balloon. The balloon didn't inflate at all. Can someone please explain what I'm doing wrong?

 

Thanks!

[Cap'n Refsmmat]

How concentrated is the hydrogen peroxide you're using?

[Vinnie881]

it says 3% hyd prox on the bottle

[Cap'n Refsmmat]

That's probably the trouble. That's not nearly concentrated enough to do anything like fill up a balloon unless you use a lot of it.

[Vinnie881]

Anyone have an idea of what items this company is using to generate their reaction

 

http://www.dr-oxygen.co.uk/

 

?

[MrSandman]

Not to mention, you acid isn't strong enough four drops won't do it. You also have the excess space in the bottle and the baloon, so the reaction just isn't strong enough. hehehe. I think this is funny

[insane_alien]

i wouldn't buy from these guys when they claim 90% of our energy comes from oxygen, hey we can live of air! wooo!

 

also, just labeling it powder A and powder B isn't actually legal, there should be a link telling you exactly what powder A and what powder B is. i wouldn't be surprised if this thing doesn't actually give off oxygen.

[John Cuthber]

OK, 3% peroxide will generate about 5 times it's own volume of oxygen. That's plenty to see the reaction, even if it's a bit low for making the bulk gas.

 

H2O2 is relatively stable in acid conditions so adding an acid won't do much to decompose it.

Adding the peroxide solution to dried yeast will decompose it nicely. Adding it to potassium permanganate will do even better- you get twice as much oxygen gas for the same amount of peroxide. On the other hand, permanganates stain everything in sight and are relatively toxic.

 

I'm not sure what Mr Sandman feels he has added to the thread.

[shadowacct]

OK, 3% peroxide will generate about 5 times it's own volume of oxygen

This is not correct, it is appr. 10 times its own volume.

 

1 liter of 3% H2O2 contains appr. 30 grams of H2O2, which is just over 0.88 mol of H2O2. When this decomposes, it produces 0.44 mol of O2. At standard pressure/temp this is close to 10 liter of gas.

 

 

 

Adding it to potassium permanganate will do even better- you get twice as much oxygen gas for the same amount of peroxide.

Again incorrect, you get 4 times the amount of oxygen:

 

Simple decomposition: H2O2 --> H2O + ½O2

 

Reaction with permanganate: H2O2 + 2MnO4(-) --> 2MnO2 + 2OH(-) + 2O2

 

You see? Four times as much oxygen per unit of H2O2. This theoretical amount in practice can be approached quite well, if H2O2 is dripped into a solution of excess KMnO4. If done the other way around, then you'll get a much lower amount, because of catalytic decomposition of H2O2 by MnO2.

 

When H2O2 is added to strongly acidic permanganate, then things are even slightly better, because the manganese even is reduced to the +2 oxidation state, which is even better than going to the +4 oxidation state, and also, there hardly is catalytic decomposition of H2O2.

[MrSandman]

10 milliters of solution. 3% of which is hydrogen peroxide that means that the hydrogen level is even less. But saying it was 3% pure hydrogen would mean. It would cover a space of 3 milliters of space. You average balloon is way more than that. I know before I didn't add much, but this makes perfect since why it didn't work. !d0!+

[Cap'n Refsmmat]

He doesn't intend to fill the balloon with liquid oxygen. When it is released as a gas it takes up much more volume.

[MrSandman]

Notice the word hydrogen in my post not OXYGEN.

[Cap'n Refsmmat]

The reaction doesn't even produce hydrogen gas -- see ShadowAcct's post. And he's not filling his balloon with water, either.

[MrSandman]

an acidic slution gives off hydrogen.

 

Well a hydrogen Ion.

[insane_alien]

hydrogen ion =/= hydrogen gas.

 

get your facts right. and hydrogen peroxide does give of oxygen in the presence of acid. i preffer just dunking in a copper catalyst but an acid will do it too.

 

an acid solution in itself i.e. H2SO4 (aq) will not give off hydrogen fumes.

[MrSandman]

Yeah I really do need to review, but anways the XP will work if you have a greater concentration.

[insane_alien]

yeah, why don't you just not start spouting off about things you don't know? it only makes you look like a fool.

 

also, you would do well to actually read what you are responding to. it helps keep discussion relevant.

[MrSandman]

Sorry, I need to review the XP, but the kid was talking about his expirament not working you look at it logicaly and see the gas given off isn't enough to fill the baloon. I know the experiment is off topic, but the topic died a long time ago.

[insane_alien]

yesterday is not a long time ago.

[MrSandman]

Which is a long time to me it is all relavent