Review Note
Last Update: 08/22/2024 06:07 AM
Current Deck: Chem Unit 3 T1 Chemical Equilirbium Systems::U3 T2 Redox Reactions
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Commit #132593
How does electrorefining work
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Commit #132593
Using an example of copper:
Unpure copper electrode is put on the positive terminal becoming the anode. The copper on the electrode is oxidised to form aqueous copper ions. Such ions are then reduced to form pure copper at the cathode.
Impurities that are less reactive than copper will form a sludge beneath the electrode as they won't be oxidised
Impurities that are more reactive than copper will oxidise. as they are better reducing agents they won't be reduced and will stay in the solution.
Unpure copper electrode is put on the positive terminal becoming the anode. The copper on the electrode is oxidised to form aqueous copper ions. Such ions are then reduced to form pure copper at the cathode.
Impurities that are less reactive than copper will form a sludge beneath the electrode as they won't be oxidised
Impurities that are more reactive than copper will oxidise. as they are better reducing agents they won't be reduced and will stay in the solution.