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Topic: Does copper dissolve in concentrated NaCl?  (Read 5280 times)

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Offline 5ruijie

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Does copper dissolve in concentrated NaCl?
« on: October 16, 2006, 08:52:03 AM »
If I carry out an electrolysis of concentrated NaCl with copper as my electrodes, what will be my result? And will copper dissolve in the concentrated NaCl?
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Offline Morphic flip

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Re: Does copper dissolve in concentrated NaCl?
« Reply #1 on: October 16, 2006, 09:15:18 AM »
Well I wouldn`t want have to wait for it to happen.
Not many chemicals dissolve copper and NaCl isn`t one of them.
H2SO4 is used for copper mining.
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Offline constant thinker

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Re: Does copper dissolve in concentrated NaCl?
« Reply #2 on: October 16, 2006, 09:31:10 PM »
I've used copper as an electrode for electrolysis. What will happen is on the cathode (positive electrode) the copper will oxidize. The oxidized copper does not dissolve into water. If you want to carry out electrolysis of water use graphite rods for your electrodes. If your just trying to dissolve copper use a concentrated mineral acid. Both Cu(I) and Cu(II) oxides are insoluble in water.

Are you sure you don't mean HCl? I've never heard of a salt being used as a solvent.
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Offline Donaldson Tan

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Re: Does copper dissolve in concentrated NaCl?
« Reply #3 on: October 17, 2006, 03:52:58 PM »
A strong oxidising solution may dissolve copper.
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Offline zwp920

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Re: Does copper dissolve in concentrated NaCl?
« Reply #4 on: October 18, 2006, 04:24:28 AM »
Generally speaking , the material on the  cathode did not dissolve at the electroanalysis reaction.
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