Large Kf value for Molar mass determination?

Question

Why would a large Kf value (ie: Camphor has a large Kf value) would make it especially convenient for molar-mass determinations?

Kf is the freezing point

Answer 1

No, Kf is not the freezing point. It is a physical characteristic of a material called the "cryoscopic constant", which is a measure of the response of a material's freezing point with respect to the presence of a solute dissolved in the material. For camphor, this value is very large, so changes in freezing points would be large and easy to measure, making the molecular mass determination of a solute relatively easy and accurate.