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Making oxygen.

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Making oxygen.

Unread postAuthor: rna_duelers » Wed Jul 19, 2006 6:50 am

I was would like to no how to produce oxygen i know that it can be made by salt water and a electric current but i was wondering if there were some chemical i could mix to make oxygen i no one chemical that can be used is peroxide but i dont no the other and help would be greatful thank you.
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Unread postAuthor: benstern » Wed Jul 19, 2006 2:18 pm

What would you use it for??? And don't even think about saying anything about spudguns!!
How to make:
1) get hydrogen peroxide
2) cut a AA battery in half
3) drop cut battery in the hydrogen peroxide
4) have a way to collect the gas that forms. (oxygen)
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Unread postAuthor: Atlantis » Wed Jul 19, 2006 2:27 pm

For the collecting part, stretch a baloon over the container and the Oxygen will fill that up.
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Unread postAuthor: boilingleadbath » Wed Jul 19, 2006 9:31 pm

Ways to produce oygen gas:

Electrololis using DC current and segragated electrodes.
Heating a clorate mixed with MnO2
catalizing the decomposition of hydrogen peroxide with MnO2

MnO2 can be cheaply purchased from any comprehensive chemical supplier, or salvaged from batteries.
I've disected dead D batteries - it takes some efort and gives you MnO2 contaminated with KOH, though. Easy to fix, though - just mix with water and decant multiple times.

As you are catalizing the decomp., you can use as little MnO2 as you want - more will just make it go faster.

As an added plus, you can react MnO2 with HCl as such:
MnO2 + 4HCl -> 2MnCl2 + Cl2 + 2H2O
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Unread postAuthor: Rambo » Thu Jul 20, 2006 4:09 pm

Don't use more then 10% H2O2 or you'll get too much wather vapors.
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