Hello

Im working with my finalexamination project. In this project, we observe that when we add NaCl to the solution, less dioxygen can dissolve, why is this?

We know that more NaCl will increase the entropi making more disorder. Does more disorder mean that less watermolecules will surround the dioxygenmolecules which will lead to less solubility?
We have also talked about that higher NaCl-concentration mean less "pockets" for dioxygen, because the water will more likely dissolve NaCl rather than dioxygen.

Is there an equation or something where this is described, or can someone confirm if we have the right thoughts

Thx in advice

Dear Erichsen;

The Ions of the Salt “bind” the water molecules much stronger and also in a higher amount as almost any other not ionic molecules.
Quintessence:  There are significantly less water molecules left to solvate other molecules.
This method is also often used in production of Dyestuffs.

Other Salts used for Proteins are Amonium-Sulfate or Potassium-Phosphate, because there strong dissociation.

I hope I have been of help to you.

Good Luck!
                    ARGOS⁺⁺

Dear IITian;

But at least of the same interest:
There are plants flourishing in such high Salt content (Great Salt Lake), which produce “Drinking Water”. Don’t ask me its name, because I did not write it up,   ─   Sorry!

I think there is still a Lot we could/have to learn.

Good Luck!
                    ARGOS⁺⁺

Dear IITian;

As they told: Yes!,   ─   At least from the Salt content.

Good Luck!
                    ARGOS⁺⁺