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A electrode is a conducting electronic (e.g. blade or block Métal lic), or ic ion (e.g. Verre) connected on a terminal of a electric Générateur. In order to establish a Electrical circuit closed, one connects the electrodes between them by a conducting solution of ions (ex: Water salted). One observes a electrolysis then.

One also speaks about electrodes to indicate components of certain electricals appliance like the Batteries, Electric fencer, vats with electrolysis, tubes, tube with x-rays, Diode S with Semi-conducteur. It is also the case in the Arc welding.

Electric principle

At the time of a electrolysis, one uses two electrodes subjected to a Potential difference.

The two electrodes are the seat of a Réaction of oxydoreduction:

One is the seat of the reaction of reduction, it is the Cathode (pole -).
the other is the seat of the reaction of oxidation, it is the Anode (pole +).

According to the conventional direction of circulation of the current, the continuous running,

enters a receiver (consuming apparatus of the electric current) by the anode

and leaves by the cathode to turn over to the generating .

Electrodes of reference in electrochemistry

August 1st

See too

Reaction of oxydoreduction

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