solution composition
2008-03-01 4:11 pm
benzene and toluene form an ideal solution. consider a solution of benzene and toluene prepare at 25 C. assume the mole fraction of benzene and toluene in vapor phase are equal, calculate the composition of the solution. at 25 C the vapor pressure of benzene and toluene are 95 and 28 torr.
回答 (1)
2008-03-01 6:59 pm
✔ 最佳答案
(This type of solution is out of the HKAL syllabus since 2007.)Mole fraction of benzene in the solution = XB
Mole fraction of toluene in the solution = XT = 1 - XB
By Raoult's law:
Mole fraction of benzene in the vapour XB' = XBPBo = 95XB torr
Mole fraction of benzene in the vapour XT' = XTPTo = 28(1- XB) torr
XB' = XT'
95XB = 28(1 - XB)
XB = 0.228
Mole fraction of benzene in the solution XB = 0.228
Mole fraction of toluene in the solution XT = 1 - 0.228 = 0.772
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