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What is the purpose of a "salt bridge" in the voltaic cell?
a. It allows electrons flow from the anode through the external circuit to the cathode.
b. It allows ions to migrate and maintain the electrical neutrality in the half cells.
c. It is the electrode at which reduction occurs.
d. It is the electrode at which oxidation occurs.

Respuesta :

Answer:

b.

Explanation:

Salt bridge   ;

 Salt bridge is a very important part of the voltaic cell.Because it act a bridge and allows the ions to flow from one location to the other location and due to flow of ions ,electrical neutrality maintain inside the cell.Salt bridge is a tube which filled by electrolyte solution of KCL or KNO₃.

So the option b is correct.