[GMAN20]

Loss of sleep and gain of tests has fried my brain so I really need any help anyone can offer!
1)A solution of 0.1 molal AgNO₃ in water is saturated with AgCl and AgBr.
   a)How many components are in the system?
   b)How many phase? Name them
   c)How many degrees of freedom? If P is fixed, can T vary?

2)Assume that benzene and toluene form ideal solutions. Pure benzene has a normal boiling point of 353.15 K; at that temperature, toluene has a vapor pressure of 350 torr.
   a) Calculate the partial and total pressures of a solution at 353.15 K with
   X_Benzene = 0.20.
   b)What composition of solution would boil at 353.15 K under a reduced pressure of 500 torr?

3) At 363.15 K a solution of n-propanol (X₂=0.259, P₂^*= 577,5 torr and water (P₁^*=527.76 torr) has a vapor pressure of 820.3 torr; the vapor phase is 39.7% n-propanol (Y₂=0.397).
   a)Calculate the vapor pressure, activities, and activity coefficients of each component
   b)What should the vapor pressure of this solution be according to Raoult's Law?

Anything will help. I have parts of each problem complete but I would like to see how you all would go about these problems. Thanks!

[Borek]

You have to show your attempts at solving the question to receive help. This is a forum policy.

[GMAN20]

1. RXN unknown
   a) 3? components (AgNO₃, AgCl, and AgBr)
   b) 2 phases (liquid and solid??)
   c) F=3-2+2= 3 degrees??, and yes T can vary is P and two other components are known??

2) X_benzene = 0.20 so X_toluene= 0.80?
P_toluene= (0.80)*(350 torr) = 280 torr
P_benzene= (0.20)*()
-how do you find vapor pressure of benzene?
P_total = P_toluene+P_benzene

b)?


That is all I have so far I will post #3 shortly