Question

Anodes Need to Be Replaced from Time to Time During the Electrolysis of Alumina.

Answer 1

Answer:

Anodes needs to be replaced during the electrolysis of the Alumina because they gets oxidized. During the Electrolysis of the Alumina, Oxygen is deposited at the anode. Now, Anode is made up of the graphite (or Carbon), thus carbon reacts with the Oxygen and forms its oxide.

Explanation:

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Answer 2

Answer:

Answer

In the electrolysis of alumina, graphite rod is used as the anode.

During the electrolytic reduction of alumina, aluminum is produced at the cathode and oxygen gas is evolved at the anode.

This gas reacts with the graphite rods (anode) and forms carbon dioxide.

Thus, the graphite rods are continuously eroded. Hence, the graphite rods i.e. anodes be replaced from time to time during the electrolysis of fused alumina.