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React the mixture with H2SO4 because copper is more reactive and a mettalic oxide so it would displace H2 from H2SO4 which would escape out in form of.
The highest karat version of rose gold is also known as crown gold, which is 22 karat. Eighteen karat red gold may be made of 25% copper and 75% gold.
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How do you separate gold from the metals it is made . Nov 03, 2009· How do you separate gold from the metals it is made with and or overlays like jewelry contacts ...
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