D. Consider the following two diagrams to answer the questions below. For each q

Question

D. Consider the following two diagrams to answer the questions below. For each question that requires the use of the composition diagram, draw your answer on the diagram with the appropriate question letter. Also, round the number of theoretical plates in each question to the nearest WHOLE NUMBER Composition Diagram For a Binary Mixture of Benzene and Toluene 390 385 380 375 370 365 360 355 350 benzene CH3 toluene area = 3 area 10 0 0.1 0.2 0.3 0.4 0.50.6 0.7 0.8 0.91 retention time (min.) i. What are the respective boiling points of pure toluene and benzene? ii. A 10 mol % solution of benzene in toluene was distilled by fractional distillation. What is the minimum number of theoretical plates needed to distill this mixture so that the first drop of distillate is 80 mol % benzene or greater? Just as weight factors (W) are used to find the weight percentage (wt %), mole factors (M) are used to obtain the mole percentage (mol %) of each compound. Assuming benzene has an Mf of 1.00 and toluene an M, of 0.86, calculate the mol % of each component represented in the gas chromatograph above. 111.

Explanation / Answer

i. As x-axes represent mol % of benzene, therefore, the boiling point of pure toluene is the point where mol % of benzene is zero (in the graph it is approximately 384K). And the boiling point of pure benzene is the point where mol % of benzene is one (in the graph it is approximately 353K).

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