Why does soda water freeze at lower temperatures?

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Granville

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Granville asked the Naked Scientists:
   
Why does soda water in plastic bottles freeze at relatively low temperatures in my refrigerator?

What do you think?

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Offline Horseradish_5000

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Why does soda water freeze at lower temperatures?
« Reply #1 on: 21/07/2009 17:50:27 »
This is because of freezing-point depression.

To briefly surmise, when a solute (bicarbonate, preservatives ect.) is disolved in a solvent(water) the melting point/freezing point of the solution is lower than that of the solvent.

So your soda water freezes at a lower temperature because its not pure water.

Try the wiki here for a more full explanation of freezing-point depression and its causes.
newbielink:http://en.wikipedia.org/wiki/Freezing-point_depression [nonactive] 

Boiling points are also raised in solutions.

Hope this helps