Similar to elevation of boiling point, depression of freezing point (DTf)
for dilute solution (ideal solution) is directly proportional to molality,
m of the solution Thus,
DTf   µ  m
or
  DTf = Kf m
(1 34)
The proportionality constant, Kf, which depends on the nature of the
solvent is known as Freezing Point Depression Constant or Molal
Example 1 8
Example 1