Let's push a little further. You are using simple distillation to purify your mixture of 40 mole % Compound A and 60 mole % Compound B and want to purify your sample to be at least 90% Compound A. What is the smallest number of distillations you need to perform to achieve at least 90% Compound A in your distillate? (2 pts)

80 70 oc 60 50 20 40 60 80 100 mole B

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Nestor RutherfordLv2

8 Nov 2019

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2.) Refer to one of the BP-Composition curves for Cyclohexane - Toluene above. Starting with a mixture of 15% cyclohexane and 85% toluene, to produce distillate having a purity of greater than 90% cyclohexane, what is the minimum number of theoretical plates that a fractional distillation apparatus would need? Show a sketch of how you determined this.

3.) How many simple distillations would produce the same result in Question 2.)?

Using Figure 5.6 and the explanation of how to read Figure 5.9 of your text, if your fractional distillation column is not well packed and only provides 2 theoretical plates (the equivalent of two simple distillations), what would be the boiling point of the distillate of your fractional distillation setup starting with a 0.95 mole fraction of water mixture?

Select one:

a. between 65-70 Â°C

b. between 80-90 Â°C

c. between 70-80 Â°C

d. between 90-100 Â°C

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