Electrolysis Definition
Definitions:
Standard Electrode Potential:
It is the EMF of any given half cell which is measured by combining it with standard hydrogen electrode (an example of a reference electrode). It is represented by E°
It is an example of a reference electrode which is used to measure standard electrode potentials of different half cells when they are combined with Standard Hydrogen Electrode. The cell is made by using a platinum electrode in a glass tube which is inverted over an electrolyte containing 1 mol/dm3 of aqueous Hydrogen ions with a supply of
Hydrogen gas through an inlet at 298k and 1 atm pressure. S.H.E is conventionally considered as a left hand side electrode.
If any half cell with an E° value greater than 0.00 is combined with S.H.E then electrons travel from S.H.E to the positive half cell. While in case of half cells which are found with more negative E° value than S.H.E, the electrons travel to S.H.E resulting in a negative value of Standard Electrode Potential.
Standard Cell Potential:
Salt Bridge:
Standard Hydrogen Electrode (S.H.E):
It is an example of a reference electrode which is used to measure standard electrode potentials of different half cells when they are combined with Standard Hydrogen Electrode. The cell is made by using a platinum electrode in a glass tube which is inverted over an electrolyte containing 1 mol/dm3 of aqueous Hydrogen ions with a supply of
Hydrogen gas through an inlet at 298k and 1 atm pressure. S.H.E is conventionally considered as a left hand side electrode.
If any half cell with an E° value greater than 0.00 is combined with S.H.E then electrons travel from S.H.E to the positive half cell. While in case of half cells which are found with more negative E° value than S.H.E, the electrons travel to S.H.E resulting in a negative value of Standard Electrode Potential.