How Much Gas Can Water Really Hold?

[Woogies]

First off, Greetings everyone!

I realize this is a pretty broad question, considering these numbers will vary with temperature, pressure and etc. But I was hoping someone could me a average number just so I can get a good idea.

I'm trying to find out the amounts of dissolved gases are in Water (Both salt and fresh). For example the usual amount of dissolved oxygen is 5-7ppm. I know that the ocean contains CO2, Nitrogen and many other gases from the atmosphere. Does anyone have average number for these gases? Like I said, just trying to get an idea here

Cheers!

 

[Borek]

For oxygen and nitrogen you should be able to google values of Henry's constant and calculate typical dissolved gas concentrations from Henry's law. For CO₂ it is much more complicated, as it depends on the solution pH and on the concentrations of other acids/bases already present.