Electrolysis: If anions continue to deposit electrons on the anode, does this mean after a while the anode becomes negative? If not how is the anode discharged from it’s electrons

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    $\begingroup$ There is an external electronic connection between anode and cathode. In electrolysis, the external circuit is a power supply that provides the energy to move electrons from the anode to the cathode via the external circuit, i.e. the anode acts as a source and the cathode acts as a sink for this external circuit. $\endgroup$ – Karsten Theis Apr 23 at 14:05
  • $\begingroup$ So the battery moves electrons from the anode to the cathode? $\endgroup$ – Ubaid Hassan Apr 23 at 15:15
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    $\begingroup$ Yes, if you are using a battery to run the electrolysis. Without the external circuit, electrolysis does not happen. Even if you just connect the electrodes with a wire, electrolysis does not happen (the electrons "want" to move in the other direction). $\endgroup$ – Karsten Theis Apr 23 at 15:20
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    $\begingroup$ There is no net half reaction taking place at the anode unless it is part of an electrochemical cell. Some anions might deliver electrons to the electrode (can't really call it anode until oxidation happens there) and become oxidized, and some oxidized species might pick up electrons again, but there is no net reaction (or even half reaction). $\endgroup$ – Karsten Theis Apr 23 at 15:29
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    $\begingroup$ Understood, thanks $\endgroup$ – Ubaid Hassan Apr 23 at 15:30

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