SolutionHard
Question
The vapour pressure of a solution of a non-volatile solute B in a solvent A is 95% of the vapour pressure of the solvent at the same temperature. If the molecular weight of the solvent is 0.3 times the molecular weight of the solute, what is the ratio of weight of solvent to solute.
Options
A.0.15
B.5.7
C.0.2
D.none of these
Solution
According to question Ps = 0.95 P0
according raoul′s law Ps = P0 XA given MA = 0.3 MB
0.95 P0 = P0
MA = molecular wt. of solvent
MB = molecular wt. of solute
0.95 =
WA = gram wt. of solvent
WB = gram wt. of solute
on solving
= 5.7.
according raoul′s law Ps = P0 XA given MA = 0.3 MB
0.95 P0 = P0
MA = molecular wt. of solventMB = molecular wt. of solute
0.95 =
WA = gram wt. of solvent WB = gram wt. of solute
on solving
= 5.7.Create a free account to view solution
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