defune electolisis of copper
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Electrolysis uses an anode that contains the impure copper that results from ore concentration. ... An electric current causes copper ions from the anodes to enter the solution and become deposited onto the cathode. Impurities either fall away and form sludge or stay in solution.
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The anode (positive electrode ) is made from impure copper and the cathode (negative electrode) is made from pure copper. During electrolysis, the anode loses mass as copper dissolves, and the cathode gains mass as copper is deposited. A half-equation shows what happens at one of the electrodes during electrolysis.
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