Oxidation
Definition and meaning of Oxidation in chemistry.
Oxidation is a fundamental chemical process characterized by the loss of electrons from an atom, ion, or molecule. It always occurs simultaneously with reduction in a paired mechanism known as a redox reaction.
In more detail
Historically, oxidation meant the addition of oxygen to a compound, but the modern definition is strictly based on electron transfer. When a chemical species is oxidized, its overall oxidation state increases. The substance that accepts the lost electrons is called the oxidizing agent, which itself becomes reduced in the process. Oxidation processes are central to many everyday phenomena, including the combustion of fuels, corrosion of metals, and cellular respiration in biology.
Key facts
| Field | General Chemistry |
|---|---|
| Mechanism | Loss of electrons |
| Result | Increase in oxidation state |
When iron rusts, solid iron (Fe) undergoes oxidation by losing electrons to form iron(III) ions (Fe3+), while oxygen is simultaneously reduced.
Frequently asked questions
Can oxidation happen without oxygen?
Yes, oxidation simply refers to the loss of electrons, which can involve other elements like halogens acting as the oxidizing agent.
What is an oxidizing agent?
A substance that causes oxidation by accepting electrons from another species.