Why does ozone have such a large solubility in water? At $25~\mathrm{^\circ C}$, the solubility of ozone is $109~\mathrm{mg~L^{-1}}$. This is $13$ times higher than the solubility of diatomic oxygen. What causes this?
If you look at the molecular structure of ozone below, you can see that it is polar.  Diatomic oxygen is non-polar.  This mild polarity of ozone greatly enhances the solubility of the molecule in a polar solvent like water.