posted by Megan on .
Suppose you are given a list of solutions (all with nonvolatile solutes) and their concentrations. You pick out the one with the lowest freezing point. It should also have (pick all that apply):
the lowest boiling point
the highest osmotic pressure
the lowest solvent vapor pressure
the highest boiling point
the highest solvent vapor pressure
the lowest osmotic pressure
i picked lowest boiling point, highest solvent vapor pressure, and lowest osmotic pressure. But it was wrong.
I think you picked all of the wrong ones.
delta T = Kf*m.
Thus for delta T to be the most, the freezing point will be the lowest. Now convert that information to boiling point.
delta T = Kf*m
For delta T to b the most, that means boiling point will be the highest.
pi = MRT for osmotic pressure. Since delta T is the highest, then molality must be the highest; therefore, pi (osmotic pressure) must be the highest.
Psoln = X<solvent>*Posolvent
If delta T is highest, molality must be the most(for the solute); therefore, the SOLVENT must be less and that will give a smaller vapor pressure.
Check my thinking.