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Author Topic: Copper Carbonate + Oxygen = ........  (Read 19675 times)

Offline Seany

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Copper Carbonate + Oxygen = ........
« on: 11/04/2007 13:54:57 »
Copper Carbonate + Oxygen = ........

Someone help me out here please?

I know that the gas formed is Carbon Dioxide, but I'm not sure of the solid. Does the Oxygen displace the Carbonate or..

Heh, someone help please, thanks =)


 

Offline eric l

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Copper Carbonate + Oxygen = ........
« Reply #1 on: 11/04/2007 16:56:18 »
Seems a bit of a strange question !  Copper(II)carbonate is the main part of the green patina on copper or bronze; the inverse reaction (copperoxide + carbondioxide giving coppercarbonate) is much more probable.
The reaction setting free the carbondioxide may be possible in acid conditions.  This would give either copperoxide [CuO] or copperhydroxide [Cu(OH)2] (depending on whether you work in dry conditions or in water).
There is also the possibility that you coppercarbonate is copper(I)carbonate, but I do not know this as a stable product.  By reaction with oxygen, you would get copper(II)oxide anyway.  Copper(I)carbonate would be Cu2CO3.
 

Offline Seany

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Copper Carbonate + Oxygen = ........
« Reply #2 on: 11/04/2007 17:05:23 »
Hmm. Well the actual question is what would happen to the Copper Carbonated when it is heated? (Oxidised)
 

Offline eric l

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Copper Carbonate + Oxygen = ........
« Reply #3 on: 11/04/2007 18:48:47 »
I suppose it will decompose into carbondioxide and copperoxide (CuO).  On cooling this CuO will (slowly) react again with carbondioxide (in the air) to form coppercarbonate.  This will NOT be an oxidatition, because the valence of the Cu will not change in the process.
 

Offline Seany

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Copper Carbonate + Oxygen = ........
« Reply #4 on: 11/04/2007 18:49:32 »
Mm.. So what will the end result be?

Copper Oxide + Carbon Dioxide? Sounds weird to me..
 

Offline Bored chemist

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Copper Carbonate + Oxygen = ........
« Reply #5 on: 11/04/2007 19:05:49 »
It may sound weird, but that's what you get.
 

Offline Seany

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Copper Carbonate + Oxygen = ........
« Reply #6 on: 11/04/2007 19:11:04 »
Mm k. Thanks all =)
 

Offline daveshorts

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Copper Carbonate + Oxygen = ........
« Reply #7 on: 13/04/2007 13:25:38 »
This reaction would go on without any oxygen, as all that is happening is that you are breaking down the carbonate.
 

Offline Seany

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Copper Carbonate + Oxygen = ........
« Reply #8 on: 13/04/2007 13:26:07 »
Ermm.. K.. I think I got it solved now, thanks Dave!
 

Offline daveshorts

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Copper Carbonate + Oxygen = ........
« Reply #9 on: 13/04/2007 18:19:53 »
For completeness a formula

Cu2CO3 → Cu2O + CO2
 

Offline Seany

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Copper Carbonate + Oxygen = ........
« Reply #10 on: 13/04/2007 21:00:28 »
:o Thanks....! :o
 

Offline Bored chemist

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Copper Carbonate + Oxygen = ........
« Reply #11 on: 14/04/2007 15:38:19 »
I think the question was probably about copper (II) carbonate.
CuCO3 ---> CuO + CO2
rather than the very obscure copper (I) carbonate
 

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Copper Carbonate + Oxygen = ........
« Reply #11 on: 14/04/2007 15:38:19 »

 

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