Both are sodium chloride (NaCl) !
Any difference exist. The correct term is "iodised"; also I suppose that you think to dissolution not to melting.
I think it is fresh water freezes faster because the salt melts ice.
Only the granulation of the salt has some influence.
Sugar water freezes faster than salt water. However, regular tap water will freeze faster than either salt, or sugar water.
the salt prevents the water from getting cold
It doesn't. Tap water freezes faster than salt water.
Fresh water freezes faster than salt water, yes.
Salt Water
salt reduces the tempature at which ice freezes
'Faster' is NOT the correct word. Pure water freezes at a higher temperature , than salt water, BUT no FASTER.
the salt lowers the freezing point.
regular water!:)