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amaresh92
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why the electrode potential arise at the electrode in contact with its ionic solution?
Topher925 said:Because electrochemical reactions are heterogeneous.
Matcon said:In its most basic form, the case of a metal electrode, some metal dissolves from the electrode surface. In doing so, insoluble metal atoms become soluble metal ions. That process involves separating electrons from those atoms. The ions go off into solution and the electrons remain behind on the electrode. The electrons give the electrode a negative charge.
Electrode potential is a measure of the tendency of an electrode to gain or lose electrons. It is a fundamental property of an electrode and is a key factor in determining the direction and rate of an electrochemical reaction.
Electrode potential is usually measured using a standard hydrogen electrode (SHE) as the reference electrode. The potential of the SHE is defined as 0V at all temperatures, making it a convenient reference point for measuring the potential of other electrodes.
The electrode potential is affected by the nature of the electrode material, the composition and concentration of the electrolyte solution, temperature, and pressure. Changes in any of these factors can cause a shift in the electrode potential.
Electrode potential forms due to the difference in the reactivity of the electrode material with the electrolyte solution. This difference in reactivity leads to the transfer of electrons between the electrode and the solution, resulting in a potential difference.
Electrode potential plays a crucial role in various electrochemical processes, including batteries, corrosion prevention, metal plating, and electrolysis. It is also used in analytical techniques such as potentiometry and voltammetry to determine the concentration of ions in a solution.