Chemistry – Electrochemistry - Electrolysis | e-Consult
Electrochemistry - Electrolysis (1 questions)
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Anode: The anode is the positive electrode where oxidation occurs. In the electrolysis of aqueous copper(II) sulfate, the sulfate ions (SO42-) are oxidized to form elemental sulfur. The half-reaction is:
Cathode: The cathode is the negative electrode where reduction occurs. Water is the most likely species to be reduced in aqueous solution. The half-reaction is:
Therefore, at the anode, sulfur is formed, and at the cathode, hydrogen gas is evolved. The inert carbon electrode prevents the formation of unwanted products like chlorine gas.