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Topic: Pure Copper Solution  (Read 11611 times)

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WaxHaX0rS

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Pure Copper Solution
« on: June 18, 2004, 10:40:24 PM »
Can anyone tell me how I can obtain a copper compound that I can dissolve in water to get pure copper ions (by pure I mean no other positive ions) in aqueous solution?  I want to try a little electroplating experiment.  I'm no expert, but I'm guessing that something like copper sulfate or copper nitrate would work?  I don't know, anyway, the catch is that I have very limited resources and I would probably be limited to buying things from the local hardware or grocery stores.

Offline Donaldson Tan

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Re:Pure Copper Solution
« Reply #1 on: June 19, 2004, 12:02:14 PM »
You must be joking if you want a solution whereby the only cation is copper when your solvent is water. water exihibits autoprotolysis - something you cannot ignore. anyway, hydrogen ion is the least of your worries. copper ions will be discharged preferentially given it's relative instability to H+

I cant guarantee pure, but you can try the following:
1. Dissolve CuO in excess aq HCl
2. Titrate using diluted NaOH with a suitable indicator

Sodium ion in solution won't pose a problem for your electroplating, as discharging the ion requires overcoming a large energy barrier.
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Offline jdurg

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Re:Pure Copper Solution
« Reply #2 on: June 19, 2004, 01:15:59 PM »
I know that hardware stores and gardening stores sell very pure copper sulfate crystals.  I can't recall what name it goes by in the stores, but you can't mistake the rich blue color of the crystals.  
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WaxHaX0rS

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Re:Pure Copper Solution
« Reply #3 on: June 19, 2004, 04:17:27 PM »
English please?  I think I used the word pure too lightly here.  I just mean something I can buy where I can easily get rid of other stuff or where there is very little other junk floating around that'll screw it up.  I don't pretend to be an expert or to know what you're talking about.  Can you enlighten me a bit?  BTW, thanks, I'll look jdurg.

Offline Scratch-

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Re:Pure Copper Solution
« Reply #4 on: June 20, 2004, 10:19:37 AM »
Also some stores sell copper chloride as white pellets for absorbing moisture in the air.
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