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Date 216123 Separation of Petroleum Hydrocarbons Pre-lab Read Organic Laboratory Techniques: Pages 77-97 1. Is cyclohexane polar or nonpolar? (0.5pt) - nonpolar 2. Is toluene polar or nonpolar? (0.5pt) nonpolar 3. Would you expect cyclohexane and toluene to form a homogencous or heterogeneous solution? (0.5pt) 4. What is the boiling point of toluene and cyclohexane? ( 1 pt) 5. Define vapor pressure. ( 1pt) 6. What are azeotropes? ( 1pt ) 7. Does toluene or cyclohexane have a higher vapor pressure? Explain your reasoning. Use the relationship between vapor pressure and boiling point to explain your answer. (2 pts) 8. What is distillation and what is it used for? (2 pts) 9. What is the difference between simple distillation and fractional distillation? Don't use the difference in glassware as an explanation. ( 2 pts) 10. How is distillation used in the oil industry? ( 2 pts) 11. What is a gas chromatography used for? How does it work? ( 2 pts) 12. Why should we heat the solution slowly? (0.5 pts)