Ozone is a molecule composed of three atoms of oxygen, but steric hindrance prevents it from forming a triangular structure, with each O atom forming the expected 2 bonds. Instead each Oxygen forms only 1 bond, with the remaining negative charge being spread throughout the molecule.
Two atoms of Oxygen form the basic Oxygen molecule-the Oxygen we breathe that is essential to life. The third Oxygen atom can detach from the Ozone molecule, and re-attach to molecules of other substances, thereby altering their chemical composition. It is this ability to react with other substances which makes Ozone an excellent Odor Removal tool and Purifier.
•Used since the beginning of the century
•Has several applications
Ozone is an oxidant
To understand why ozone is an oxidant, we first need to understand the concept of oxidation states. The oxidation state refers to the formal net gain or loss of electron(s) from an atom relative to the number of electrons in its valence shell. For example, in water, the oxidation state of both hydrogen atoms is +1 (because hydrogen has formally yielded its electron to the oxygen atom), and the oxidation state of the oxygen atom is -2 (because oxygen has formally acquired an electron from each hydrogen atom). The oxidation state for oxygen atoms is usually -2.
However, in both ozone and molecular oxygen, the oxygen atoms each have an oxidation state of 0. Therefore, ozone and oxygen are both oxidants because they are capable of drawing electrons from a source, decreasing the oxidation state of at least one of their oxygen atoms in the process.
In practice, however, ozone is a more powerful oxidant than oxygen partly because ozone can readily react with a substrate on its own whereas oxygen usually requires a catalyst (such as a metal ion) to initiate a reaction.