What Conclusion Can You Draw Regarding The Relative Efficiencies Of The Two Separations

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12 - Assault the O-ring to the back up stand - le wire ment to back up the graduate cylinder on the O-ring - Elserve the fractional distillation setup. - Turn on the water Heighten the mantle se plough on the head - Add together aluminum vicious to insulate - bizassemble the serial. Dispose of solvent properly sample Fractional vol ( me ) Temp ( 'c) Vol ( me ) 1st dret 72 52 45 65 4 76 65.v 78 6 65.5 CG 10 67 168 68 68 68 71 106 87.5 106 93 107 95 107 105 107 106 102 106 106

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Exp. No Experiment/Subject Date Proper noun Lab Partner Locker Desk No. 110 100 cyclorbone 95 90 85 Simple 80 Temperature 75 70 fractional 65 60 l ten an as 30 35 xl 45 l Volone of Distillate

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Lab 2. Separating Cyclohexane and Toluene past Distillation section engagement Post-Laboratory Questions 1. For macroscale distillations, or for microscale distillations using glassware with elastomeric connec- tors, plot the information for simple distillation and for partial distillation on one graph. Plot temperature on the vertical axis and total volume of distillate on the horizontal axis, as shown in Effigy 6 earlier in this module. Describe a smoothen bend through the information points for each distillation. 2. (a) At what temperatures were the kickoff driblet of distillate collected in the simple and fractional distillations? (b) Using Figure one, guess the composition of these initial samples of distillate. Based on the results, what conclusion can you draw regarding the relative efficiencies of the two separations? 3. For macroscale distillations, or for microscale distillations using glassware with elastomeric connec- tors, compare the plot from your simple distillation with that from your fractional distillation. In which case practice the changes in temperature occur more than gradually? Which method is more effective in achieving separation? Briefly explain. 4. For Hickman still or for exam tube microscale distillations, compare the refractive index data for simple and partial distillations. Do the information suggest which distillation process is more than efficient? Briefly explain.

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