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Topic: Odd electrolysis results  (Read 6670 times)

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Offline Scratch-

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Odd electrolysis results
« on: July 19, 2004, 11:24:46 PM »
I did electrolysis of sodium chloride with copper electrodes and I got a yellow precipitate, and then it slowly changed from yellow to blue over a couple days. Any idea what this stuff is?
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Offline Mitch

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Re:Odd electrolysis results
« Reply #1 on: July 20, 2004, 07:20:58 PM »
What you saw was most likely oxygen oxidizing the copper over time. In the future don't do electrolysis experiments with copper.
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Offline Mercuric cyanide

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Re: Odd electrolysis results
« Reply #2 on: August 26, 2014, 04:54:46 PM »
Sorry to bring up a very old thread. Why not do electrolysis experiments with copper? Copper salts aren't very toxic.
BTW, the yellow insoluble powder was impure copper (I) chloride, which was slowly oxidized to Copper (II) chloride (greenish-blue).
« Last Edit: August 26, 2014, 05:12:19 PM by Mercuric cyanide »
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