Why is CO2 less soluble in salt water than fresh water? (1 Viewer)

[enigma_1]

I'm trying to figure out why salt is used in the decarbonating soft drink practical, hence the above question arises. Help much appreciated.

 

[aimpacc]

most ions in salt water is already joined to sodium ions???

 

[pheelx3]

Because CO2 only dissolves due to the dispersion forces between H2O and CO2 (remember, dispersion forces exist between everything its just how strong they are).

And the ion-dipole bond with Na+ Cl- with the H2O is much stronger than any dispersion force, and hence, CO2 is has much less free electrons running around (held in ion dipole bonds), and experiences a much lower extent of dispersion forces.