Properties and structure of ozone
| Ozone is a blueish, colored gas that has a boiling point of -112 oC. At atmospheric pressure, ozone can partially dissolve in water. At standard pressure and temperature, the solubility of ozone is thirteen times that of oxygen. |
The oxidation potential of 2,07 Volt proves, that ozone is a strong oxidizer, in fact it is one of the strongest oxidizers available for water treatment.
Concentrated mixtures of ozone and oxygen that contain more than 20% ozone can become explosive in both fluids and gases. In commercial ozone generators these concentrations do not occur, because these cannot easily be generated.
Ozone is fairly unstable in a watery solution; its half-life in water is about 20 minutes. In air, ozone has a half-life of 12 hours, which makes the stability of ozone in air superior .
The structure of ozone is as follows:
Figure 1: structure of ozone
The symbols δ+ en δ- show, that ozone molecules are short of electrons on the locations where these signs occur. This means that ozone is a dipolar molecule. This causes ozone to have characteristic properties. Ozone reacts very selectively and is electrophilic [6,7].