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Question

Explain the following

A graphite anode is preferred to other inert electrodes during the electrolysis of fused lead bromide.


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Solution

A graphite anode is preferred to other inert electrodes during the electrolysis of fused lead bromide.

  • Because graphite anode is an inert electrode that can withstand the red-brown vapors of bromine obtained as a product at the anode. since it is inert, the deterioration due to bromine vapors does not occur. but in other inert electrodes, the deterioration of electrode takes place due to bromine vapors
  • Since it is inert it does not react with molten lead bromide also. that's why graphite is preferred over other inert electrodes.
  • An inert electrode is an electrode that does not participate in the reaction. their function is just to provide an interface for the reaction.

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