Chemistry / Unit 8 Chem 1564 short lesson, about 20 seconds
Freezing Point Depression
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The idea
Freezing point depression is the drop in a solution's freezing point below its solvent's, proportional to solute molality through a separate constant.
In practice
Salting an icy road lowers the mixture's freezing point below 0 °C, melting ice that would stay frozen.
Where people slip
Freezing and boiling constants differ for one solvent — using one in place of the other swaps in the wrong number.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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