Migration of ions
The Electricity is carried out through solution of an electrolyte by migration of ions. Therefore,
(1) Ions move toward oppositely charged electrodes at different speeds.
(2) During the process of electrolysis, ions are discharged or liberated in equivalent amounts at the two electrodes, no matter what their relative speed is.
(3) The Concentration of electrolyte changes around the electrode due to the difference in the speed of ions.
(4) Loss of concentration around any of the electrode is proportional to the speed of ion which moves away from the electrode, so
The relation is valid only when the discharged ions do not react with atoms of the electrodes. However when the ions combine with the material of the electrode, concentration around the electrode shows an increase.
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