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In a voltaic cell, the salt bridge acts to:


Provide a direct contact between the oxidation and reduction electrodes


Provide an input of energy for the oxidation half-reaction.


Provide constant overall balanced concentration of ions.


Provide a surface for oxidation and reduction to occur.

Verified Answer :

Provide a direct contact between the oxidation and reduction electrodes - A

The salt bridge acts to maintain a constant ion concentration for both of the half-cells. The anions are moving toward the oxidation side and the cations are moving toward the reduction side via the salt bridge.

Therefore the answer is C- provide constant overall balanced concentration of ions.

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