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May 15, 2011· Extracting copper from copper oxide
a Transfer one spatula measure of copper(II) oxide to a hard glass testtube.
b Carefully add one spatula of charcoal powder on top of the copper oxide without any mixing.
c Strongly heat these two layers for five minutes in a Bunsen flame.
d Allow to cool and then look closely at where ...
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Sep 24, 2017· Aqua regia is a Latin word which means royal or kings water. so named by alchemist because it can dissolve noble metals like gold and platinum. This article is about aqua regia process for gold dissolving and extracting. Aqua regia is a combination of HCL and HNO3. 3 parts of HCL and 1 part of HNO3 make aqua regia for gold dissolving.