Calculate the vapor pressure at 85.0°C of a solution prepared by dissolving 0.550 mol of liquid dibromoethane (C2H4Br2, P° = 127 torr) in 1.80 mol of liquid dibromopropane (C3H6Br2, P° = 173 torr).

93.2 ml + 3920 ml = 4013 ml total  

(93.2 ml) * (2.03 m) / (4013 ml) = 0.0471 m

the volume in in l of the diluted solution would be 0.0471 m.

a  solution  is always transparent, light passes through with no scattering from solute particles which are molecule in size. the  solution  is homogeneous and does not settle out. a colloid is intermediate between asolution  and a  suspension. while asuspension  will separate out a colloid will not.