Question

A solution of 100g of water contains 23 g of table salt. At what temperature will it begin to freeze?

Answer 1

molality m= moles salt/kg of water


freezing point depression = .52C * m

Answer 2

Thanks, I got -2.08 Celsius. Where did the "freezing point depression = .52C * m" come from?

Answer 3

delta T = K _f*molality
K _f is the molal freezing point constant for water.

Answer 4

K_f = 1.86 degrees C/m for water.