问答题
Camphor, C10H16O, which has a freezing point of 174℃, has a freezing point depression constant of 40.0℃/m. Explain the usefulness and the limitations of camphor as a solvent for determination of molecular weights. For what kind(s)of solutes would camphor be especially useful?
【正确答案】The freezing point depression constant is so large that an accurate freezing point depression can be obtained on a solution with very few moles dissolved per kilogram of camphor. Thus, high molecular weight materials give measurable freezing point depressions in this solvent. There is a problem in getting many materials to dissolve in camphor, however.