Standard emf or Standard Cell Potential Formula
The standard cell potential or standard electromotive force (emf) is the difference between the electrode potential (reduction potential) of the cathode and anode.
Or
The difference of potential between the electrode corresponding to a external flow of electrons from anode to cathode is known as cell potential or standard emf of the cell.
Or
The potential of the galvanic cell when all the substance involve in the cell reaction are in the standard state is known as standard cell potential or standard emf of cell. It is denoted by E°cell .
Oxidation potential:
The potential associated with an oxidation reaction at a electrode is called as oxidation potential.
Reduction potential:
The potential associated with an reduction reaction at a electrode is called as reduction potential.
Standard oxidation potential:
The potential for the oxidation half reaction that occur at the electrode when all the substance involve are in their standard state is known as standard oxidation potential, it is denoted by E°oxidation .
Standard reduction potential:
The potential for the reduction half reaction that occur at the electrode when all the substance involve are in their standard state is known as standard reduction potential, it is denoted by E°reduction .
Formula :
E°cell = E°cathode – E°anode
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