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a smelter does more than just melt the gold into a bar. gold smelting is the process by which impurities are removed from the gold. this is accomplished by using
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4b. purification of copper by electrolysis (extraction from ore above). the impure copper from a smelter is cast into a block to form the positive anode.the cathode is made of previously purified copper.these are dipped into an electrolyte of copper(ii) sulphate solution.; when the d.c electrical current is passed through the solution electrolysis takes place.
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