Thread: Fizzy stuff....
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Ian Hoare
 
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Salut/Hi Mark Lipton,

le/on Fri, 28 Jan 2005 16:23:08 -0800, tu disais/you said:-


>> Keep it in the coldest part of the fridge overnight and you'll have
>> plenty of bubbles the following afternoon or evening.
>>

>
>Sorry, but your Chem 101 is a bit rusty it would seem. The issue is the
>solubility of carbonic acid (hydrated CO2) in water-ethanol. Solubility
>does not generally increase at lower temperature; quite the contrary, in
>fact.


Mark!!!! Is it the addition of ethanol that changes things? Because the
solubility of gases in water (though I thought it was in all solvents) does
increase with falling temperatures. Otherwise you wouldn't get gas bubbles
occurring in water when it is heated - long before boiling point.

It's almost equal pleasure to be able to read you here again and to be able
to query a question of chemistry!

> Additionally, if you should reach a critical point (freezing
>point, in this case) you would degas the solution as solubility goes to
>zero at all critical points.


Interesting... that I didn't know.


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All the Best
Ian Hoare
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