ELECTROCHEMISTRY 1 / 5 Which of the following factors does not affect the electrode potential of an electrode? Nature of the electrode (metal) Temperature of the solution Molarity of the solution Size of the electrode Electrode potential is the tendency of an electrode to accept or to lose electrons. Electrode potential depends on the nature of the electrode, temperature of the solution and the concentration of metal ions in the solution. It doesn’t depend on the size of the electrode. 2 / 5 Which of the following statements is correct regarding Electrochemical cells? Cell potential is an extensive property Cell potential is an intensive property The Gibbs free energy of an electrochemical cell is an intensive property Gibbs free energy is undefined for an electrochemical cell Cell potential is an intensive property as it is independent of the amount of material present. Gibbs free energy is defined for an electrochemical cell and is an extensive property as it depends on the quantity of the material. 3 / 5 Which of the following is not a generally used electrolyte in the salt bridges used to connect the two half-cells of an electrochemical cell? NaCl KNO3 KCl ZnSO4 A salt bridge is a device used to connect the oxidation and reduction half-cells of a galvanic cell (a type of electrochemical cell). Strong electrolytes are generally used to make the salt bridges in electrochemical cells. Since ZnSO4 is not a strong electrolyte, it is not used to make salt bridges. 4 / 5 An electrochemical cell generally consists of a cathode and an anode. Which of the following statements is correct with respect to the cathode? Oxidation occurs at the cathode Electrons move into the cathode Usually denoted by a negative sign Is usually made up of insulating material Cathodes are usually metal electrodes. It is the electrode where reduction takes place. The cathode is the positive electrode in a galvanic cell and a negative electrode in an electrolytic cell. Electrons move into the cathode. 5 / 5 When equilibrium is reached inside the two half-cells of the electrochemical cells, what is the net voltage across the electrodes? > 1 < 1 = 0 Not defined A half-cell is half of an electrochemical cell (electrolytic or galvanic), where either oxidation or reduction occurs. At equilibrium, there is no transfer of electrons across the half cells. Therefore, the potential difference between them is nil. Your score isThe average score is 0% 0% Restart quiz