* Anode: This is the electrode where oxidation takes place. The anode is the positive electrode in an electrolytic cell.
* Cathode: This is the electrode where reduction takes place. The cathode is the negative electrode in an electrolytic cell.
Here's a breakdown:
* Oxidation: The loss of electrons. This happens at the anode.
* Reduction: The gain of electrons. This happens at the cathode.
Example:
In the electrolysis of water, the following reactions occur:
* Anode (oxidation): 2H₂O → O₂ + 4H⁺ + 4e⁻
* Cathode (reduction): 4H⁺ + 4e⁻ → 2H₂
Essentially, the electrolytic cell uses electrical energy to force a non-spontaneous chemical reaction to occur. The reactions happen at the electrodes because the electrodes provide the surface for the electron transfer necessary for oxidation and reduction to take place.
