Cell Potential or EMF of the Cell

Cell Potential or EMF of the Cell

(1) “The difference in potentials of the two half – cells of a cell known as electromotive force (emf) of the cell or cell potential.”

The difference in potentials of the two half – cells of a cell arises due to the flow of electrons from anode to cathode and flow of current from cathode to anode.

(2) The emf of the cell or cell potential can be calculated from the values of electrode potentials of two the half – cells constituting the cell. The following three methods are in use :

(i) When oxidation potential of anode and reduction potential of cathode are taken into account

 Oxidation potential of anode + Reduction potential of cathode 

(ii) When reduction potentials of both electrodes are taken into account

(iii) When oxidation potentials of both electrodes are taken into account

 Oxidation potential of anode – Oxidation potential of cathode 

Get practice papers FREE

BOOK A FREE TRIAL
Copyright © 2010-2011 www.emedicalprep.com. All rights reserved.
Skip to toolbar