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Solubility of ionic compounds

Hi,

I would appreciate it if someone could explain to me why some salts are soluble in water while others such as lithium fluoride are not?

Thanks
Original post by Diligence
Hi,

I would appreciate it if someone could explain to me why some salts are soluble in water while others such as lithium fluoride are not?

Thanks


Heya, I'm going to put this in the chemistry forum for you as you should get more responses there. :smile:

You should also check out the forum to see if there's any other threads there which might be helpful to you!

http://www.thestudentroom.co.uk/forumdisplay.php?f=130
Original post by Diligence
Hi,

I would appreciate it if someone could explain to me why some salts are soluble in water while others such as lithium fluoride are not?

Thanks


All about the thermodynamics of it. The gibbs free energy of the process must be negative. So ideally a large enthalphy of solvation, a low lattice enthalpy and not a particularly positive entropy change for the process.

LiF has high Enthalpy of solvation and lattice but a very disfavourable entropy change

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