What is the role of salt bridge in electrical cells ?

What is the role of salt bridge in electrical cells ?
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Answer :

During the oxidation and deoxidation reaction of electrochemical cells, there is an excess of cation in the oxidation half-cell and anion in the dehydration half-cell. As a result, the flow of electricity is interrupted and it stops for a while. That is why salt bridges are used in the formation of complete electrochemical cells. The current electrolysis in the salt bridge maintains the electrical neutrality of both cation and anion half-cell solution.
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