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Vinegar electrolysis

by MadM
Tags: electrolysis, vinegar
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MadM
#1
Aug17-14, 05:52 AM
P: 9
I tried vinegar electrolysis using 2 copper electrodes and 9v adaptor
it gave dark brown material on the (-) electrode
blue solution
what is the blue solution? since i used white vinegar (which contains water) could it be copper hydroxide?or copper acetate?
what is the brown material on the cathode?
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Borek
#2
Aug17-14, 09:11 AM
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Blue is most likely copper aqua complex.
MadM
#3
Aug17-14, 11:40 AM
P: 9
? what is this exactly? is there an exact formula of it?

Borek
#4
Aug17-14, 01:07 PM
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Vinegar electrolysis

http://en.wikipedia.org/wiki/Metal_aquo_complex

(apparently the correct spelling is aquo, sorry about that; English names are terra incognita to me)
MadM
#5
Aug17-14, 01:16 PM
P: 9
Thanks for this infos
But why is it aquo? why not acetate or hydroxide ? how can i make sure it is aquo and not another copper compound??
MadM
#6
Aug17-14, 01:24 PM
P: 9
And another thing
Is this aquo the same thing as colloid?
Borek
#7
Aug17-14, 03:24 PM
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Quote Quote by MadM View Post
But why is it aquo? why not acetate or hydroxide ? how can i make sure it is aquo and not another copper compound??
Hydroxide is a solid. Some copper acetate complex is possible, but how much - depends on the vinegar concentration and complex stability constants.

Quote Quote by MadM View Post
Is this aquo the same thing as colloid?
No. Hydroxide is a solid, aquo complex is a dissolved cation (whatever the counter ion is).


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