Which statement(s)is(are)defined INCORRECTLY?
I Ohmic potential is the voltage to overcome the electrical resistance of the solution in an electrochemical cell when a current is flowing.
II Concentrational polarization occurs when the concentrations of the reactants or products at the surface of an electrode is greater than those in the bulk solution.
III Overpotential is the voltage required to overcome the activation energy for a reaction at only the cathode.
IV E = E(cathode)- E(anode)- IR - overpotentials - concentration polarization

Question

Quizplus · Accepted Answer

II is incorrect because concentration polarization occurs when the concentrations of the reactants or products at the surface of an electrode are different from those in the bulk solution, not necessarily greater. III is incorrect because overpotential is the voltage required to overcome the activation energy for a reaction at both the cathode and anode, not just the cathode. IV is incorrect because the equation should be E = E(cathode) - E(anode) - IR - overpotentials - concentration polarization, which is correct as stated, so it is not defined incorrectly.

Which Statement(s)is(are)defined INCORRECTLY? I Ohmic Potential Is the Voltage to Overcome the Electrical