Question
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.
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.
Answers
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.
P<sub>soln</sub> = X<solvent>*P<sup>o</sup><sub>solvent</sub>
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.
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.
P<sub>soln</sub> = X<solvent>*P<sup>o</sup><sub>solvent</sub>
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.
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