(1pts) 1. Is it possible to separate a mixture of ethanol and toluene via distillation to pure components? (2pts) Choose the best explanation for your selection above. A. The boiling points for ethanol and toluene are too close together. B. Ethanol and toluene form an azeotrope. C. The boiling points for ethanol and toluene are far apart. ( 5pts) 2. Fractionating columns normally work better if they are insulated in order to maintain a smooth temperature gradient in the column. Why is there a temperature gradient in a fractionating column? A. As you move up the column, the vapour becomes more enriched in the lower boiling fraction so the boiling point of the liquid decreases. B. As you move up the column, the vapour becomes more enriched in the higher boiling fraction so the boiling point of the liquid decreases. C. As you move up the column, the vapour becomes more enriched in the lower boiling fraction so the boiling point of the liquid increases. D. As you move up the column, the vapour becomes more enriched in the higher boiling fraction so the boiling point of the liquid increases. (1pts) 3. The boiling point of dichloromethane is 39.6C. What is the vapour pressure (in mmHg ) of dichloromethane at this temperature? (1pts) 4. What effect does an increase in atmospheric pressure have on the boiling point of a liquid? (2pts) 5. Why is it important to have cooling water enter the bottom of the condenser and not the top? A. Water entering at the bottom keeps the condenser full of water. B. Water entering at the top is too heavy to support. C. The bottom of the condenser needs to be cooler to ensure vapour condenses before collection. ( 5pts) 6. Compound A has a vapour pressure of 350mmHg at 95C whereas compound B has a vapour pressure of 140mmHg at the same temperature. If A and B are miscible, what is the vapour pressure (in mmHg ) of a 4:1mixture of A and B at 95 C