Quiz Bank 3

Quiz Bank 3 - Quiz Bank 3 1. Joe Chemist distilled an...

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Quiz Bank 3 1. Joe Chemist distilled an EtOH/H 2 O mixture using a simple distillation and obtained 6 mL of distillate (the liquid that comes out of the apparatus, not the liquid left inside). When Jane Chemist attempted to separate the same mixture using a fractional distillation she obtained 2.5 mL. What could account for the differences in the volumes of distillate collected by both students? Assume that both students started with the same initial volume of the same mixture. (Ch. 11) 2. Using the diagram below, explain what L 1 , V 1 , and L 2 are. 3. Use the diagram above to answer the following questions. What is the boiling point of pure hexane? What is the boiling point of a 60:40 mixture of hexane:pentane? If an 80:20 mixture of hexane:pentane is vaporized and condensed, what is the ratio of the condensate? How many vaporizations-condensation sequences are needed to have the condensate of an original 80/20 (hexane/pentane) mixture to get to 95% pentane? (Ch. 11) 4. Suppose you had a mixture of 2 moles of methanol and 1 mole of ethanol at a particular temperature. The vapor pressure of pure methanol at this temperature is 81 kPa, and the vapor pressure of pure ethanol is 45 kPa. What is the mole fraction of methanol? What are the partial pressures attributed to methanol and ethanol in this solution? (Ch. 11)
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Quiz Bank 3 - Quiz Bank 3 1. Joe Chemist distilled an...

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