Fractional Distillation of Unknowns

Obtain a 50 50 mixture of two unknown solvents from your instructor. These solvents will differ in boiling point by more than 20 °C. Possible solvents include hexane, cyclohexane, heptane, octane, toluene, ethyl benzene, acetone, methanol. 1-butanol, tetrahydrofuran. 1.4-dioxane. ethyl acetate, and others listed by your 

Unless directed to do otherwise, pour the pot residue into the container for nonhalo-genated organic liquids and return the distillation fractions to a bottle marked Recovered Cyclohexane and Toluene.  

Specify whether a simple distillation or a fractional distillation would be more suitable for each of the following purifications, and briefly justify your choice. 

Sketch and completely label the apparatus required for fractional distillation. 

Explain why a packed fractional distillation column is more efficient than an unpacked column for separating two closely boiling liquids. 

---

Comparative Fractional Distillations, p. 142 Fractionation of Alternative Binary Mixtures, p. 142 NEW Fractional Distillation of Unknowns, p. 142... 

---