Quote:
Originally posted by Fishcop
Tcar, out of interest, pure water can be cooler that 32F/0C and remain liquid. It's called "Stoke's Theorum". Basically when you cool water it can "dip" below 32F/0C in a kind of "spike"... not for very long mind you 
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Thanks, I'd vaguely heard something like that...but couldn't remember any details.
You can make solutions out of many chemicals, not just NaCl (table salt).
Solutions don't just lower the freezing point, they also raise the boiling point. Antifreeze is a solution (ethylene glycol and water). Salt doesn't work because it destroys the metal, but some early manufacturers (early 1900's) used sugar water in the cooling system.