106 g mole footon- noto of sokon t 101 g book 29. At 25 C the vapor pressures of

Question

106 g mole footon- noto of sokon t 101 g book 29. At 25 C the vapor pressures of benzence and toluene are 96.0 and respectively. When a 1:1 molar mixture of benzene and toluene is fractionally distilled, the first fraction will have a mole fraction of benzene that is closest to A) 0.0. B) 0.5. D) 1.0. 30. Which of the following solutions will have the lowest freezing point? A) 0.0100 m NaCl B) 0.0120 m Li2SO4 C) 0.0400 m CH3CH2CH20H D) 0.0150 mm MgC12 in water? for water is 1.86 cm. 31. What is the expected freezing point of a 0.50 m solution of Na2co3 A) -0.93 C B) 1.90C C) 2.8%C point of pure benzene is found to be 80.10 C. What is the approximate molecular of benzene D) -6.5°C

Explanation / Answer

Ans 29. C) 0.7

The mole fraction of benzene is closest to 0.7 and that of toluene is closest to 0.3.

Fractional distillation seperates the liquid based on the difference in boiling point . Benzene has vapour pressure of 96.0 mm Hg and that of toluene is 30.5 mm Hg , so benzene will leave the flask first and the distillate has the major amount of benzene in it.

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.