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What ispolarizationin chemistry Class 11

Polarization is a mechanism that typically results in a change in the potential of an electrode during electrolysis, when the anode’s potential becomes nobler than that of the cathode. It has the effect (based on conditions) of decreasing the output voltage of batteries, and increasing the voltage required for electrolysis cells or lowering currents.

What is polarizability in Chemistry

Cathodic cleaning is a procedure to remove buildup or corrosion formations from a metallic surface by wiring it as an electrode to an electric current in an electrolytic cell. It is a type of electroplating activity that is effective and causes minimal surface interference. This precision cleaning… View Full Term

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What ispolarizationin Chemistry with example

Resistance polarization describes the potential drop due to the high resistivity of the electrolyte surrounding the electrode. It may also be a result of the insulation effect of the film on the electrode surface formed by the reaction products. Resistance polarization is expressed by the Ohm's law.

What is electrodepolarization

Polarization as an electrochemical phenomenon is of importance in the corrosion process. For all metals and alloys in any aqueous environment, cathodic polarization always reduces the corrosion rate. Cathodic protection refers to the application of a cathodic polarization to a corroding system.

Concentration polarization of an electrode is the result of the formation of a diffusion layer adjacent to the surface of the electrode where there is a gradient of ion concentration. Diffusion of the ions through the layers controls the electrochemical reaction and is important for processes such as electroplating and corrosion. Concentration polarization may be reduced by increasing agitation or raising the temperature of the electrolyte.

Activation polarization occurs when the electrochemical reaction proceeds through several successive steps. The speed of the overall reaction is determined by the slowest step (known as the rate-determining step) of the process. For example, in a hydrogen reduction reaction, the reaction may proceed as follows:

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Chemical polarizationexamples

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