February 28, 2024

Definition : When elements are arranged in increasing order of their standard reduction electrode potentials, the series so obtained is known as electrochemical (or) electromotive series. or A series in which standard reduction potentials of various electrodes are arranged in the order of increasing reduction potentials (largest reduction potential at the top) or decreasing oxidation

Nernst equation can be used to calculate the emf of the cells when the concentration of reactants and products are known. Let us consider a general redox reaction Mn+ + ne– [latex] \rightleftharpoons [/latex] M. For any reversible reaction, the change in free energy ΔG and equilibrium constant K can be related using van’t Hoff’s isotherm as