Re: Solubility

In article <496ad1cf$0$3799$afc38c87@xxxxxxxxxxxxxxxxxxxx>,
"Lab Rat" <robbie.buckley@xxxxxxxxxxxxxxx> wrote:

Don't know if I would call NaCl 'highly' soluble. DeltaG = Delta H + T Delta
S, and since the dissolved salt is more disordered, salts are generally more
soluble at higher temperatures. Since table salt does not follow this trend,
what does that suggest about the entropy of the salt solution vs that of
pure water and solid salt?

Many calcium salts become LESS soluble a higher temperatures as a
consequence of these thermodynamic realities. I once had the opportunity
to ask Richard Feynman in a lecture room setting about this phenomenon.
He quickly added that for slightly soluble substances, the solubility
will always increase with increasing temperature. It is the entropy
argument.

Bill

--
Private Profit; Public Poop! Avoid collateral windfall!
.

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