[Hgrigsby]

Here is the question I have.  I am asked to determine an approximate mass of sodium chloride needed to prepare a mixture containing 725.0 grams of ice slush at -10 degrees C.  I have been working on this problem for four hours!  My professor told me all I need is in the problem, but don't I need the Kf of NACL?  I tried converting the 725 g to kg then to mol, but I needed the molality so that led nowhere.  I tried Tf (solvent)- Tf(solution) but I don't know what to do with an anser I would get, which I can't cuz I don't know the mass of the bleepy bleep bleep solute!!!!!!

[madscientist]

Your question doesnt make sense

quote the question exactly and well be able to help you.

cheers,

madscientist :albert: