An electrochemical cell has both a silver anode and a silver cathode.The solutions of silver nitrate in contact with the electrodes have different concentrations.Which statement(s) correctly describe(s) this cell?
I.The cell potential is 0.
II.The cell potential is negative.
III.The cell potential is positive.
IV.No electrons will flow through the external circuit.

Question

An electrochemical cell has both a silver anode and a silver cathode.The solutions of silver nitrate in contact with the electrodes have different concentrations.Which statement(s) correctly describe(s) this cell? 
I.The cell potential is 0.
II.The cell potential is negative.
III.The cell potential is positive.
IV.No electrons will flow through the external circuit.

Quizplus · Accepted Answer

III) The cell potential is positive. This is because the cell operates on the principle of the concentration cell, where the difference in concentration of the silver ions between the two half-cells creates a potential difference. Electrons will flow from the anode to the cathode (from lower concentration to higher concentration of Ag+ ions) to equalize the ion concentration, generating a positive cell potential.

An Electrochemical Cell Has Both a Silver Anode and a Silver