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Old Dec 8th 2017, 12:59 AM   #4
oz93666
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Join Date: May 2017
Location: thailand
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I see ...you want any copper compound to give color to a flame ...

Dissolving the copper in nitric acid would be best , but I guess you don't have this ...

doing by electrolysis , hydrochloric acid may work in a limited way , the nascent chlorine released will react with the copper ... have a look on Youtube , salt water electrolysis with copper electrodes or just put copper in hydrogen peroxide and vinegar (see Youtube)
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