# How long does it take to saturate H2O with O3 [closed]

Let’s assume I have one liter of distilled $\ce{H2O}$ in an stainless steel container – from the bottom side of the container I do bubble ozone trough the $\ce{H2O}$.

Of cause it is not pure O3, so let’s assume that the gas consists of:

7% $\ce{O3}$

83% $\ce{ O2}$

10%. $\ce{ N2 / NO2 / NO}$

The gas flow is about 5 liters per minute and the corona discharge consumes about 500W.

How long will it approximately take, till full saturation of the $\ce{H2O}$ with $\ce{O3}$ will take place?

The solubility of ozone in water as per one website is:

First thing is to establish which curve you need. In 1 m$^3$ gas you have 70 L ozone:

$\frac{70\ L\ \ce{O3}}{1\ m^3}\frac{1\ mol}{0.082\cdot 298\ L}\frac{16\cdot 3\ g\ \ce{O3}}{1\ mol}= 138\ g\ \ce{O3}/m^3$

Let us take the curve of 150 g/m$^3$ which has an ozone solubility of 30 mg/L water. Then:

$\frac{30\cdot 10^{-3}\ g\ \ce{O3}}{1\ L\ \ce{H2O}}\frac{1\ mol}{16\cdot 3\ g\ \ce{O3}}\frac{0.082\cdot 298\ L}{1\ mol}\frac{1\ min}{5\cdot 0.07\ L\ \ce{O3}}= 0.044\ min$

• I understand what you write. The distance diffused in time $t$ is $L=\sqrt{6Dt}$ and for, say, oxygen in water ,$D\approx 10^{-5}$ cm$^2$/s (which is a typical value) meaning that in 1 sec the gas has diffused only $\approx 0.01$ cm. So I think it will take far longer to dissolve that than you estimate. Of course it will depend on the gas pressure also. Jan 26 '18 at 14:50