And this means that our freezing and melting point lowers. Now that melt by which our freezing and melting point lowers can be found by a similar formula. The change in temperature is equal to a new constant that depends on the substance being melted or frozen. Times the morality of our substance. Times I the number of particles a soluble dissociates into. Now we have to be careful with freezing point depression because adding a salute to a pure substance will only decrease the freezing point to a certain extent.