For each pair of compounds that require fractional distillation ...

[luvbio]

For each pair of compounds that require fractional distillation for separation in Problem 6,
  how many theoretical plates would be required? What type of fractionating column would
  give the proper number of theoretical plates?

Question 2

Which of the following pairs of compounds be separated by simple distillation? Which would
  require fractional distillation? (Boiling points for organic compounds are found in both online
  databases and printed handbooks. See Technique 17, p. 198.)
  (a) n-butyl acetate and 2-ethyl-1-hexanol
  (b) 3,3-dimethyl-2-butanone and 1-chloro-2-propanone
  (c) cyclopentanol and 2-methyl-1-propanol
  (d) 2-heptanone and n-pentyl propionate

[chem1s3]

Answer to Question 1

(a) bp difference 3, between 50 and 100 theoretical plates, spinning band column
(b) bp difference 3, between 50 and 100 theoretical plates, spinning band column
(c) bp difference 33, 5 theoretical plates, glass helices or metal sponge
(d) bp difference 18, about 10 theoretical plates, glass helices or metal sponge, although a
spinning band column might work better

Answer to Question 2

(a) fractional: n-butyl acetate, bp 188; 2-ethyl-1-hexanol, bp 185
(b) fractional: 3,3-dimethyl-2-butanone, bp 106; 1-chloro-2-propanone, bp 119
(c) fractional: cyclopentanol, bp 141; 2-methyl-1-propanol, bp 108
(d) fractional: 2-heptanone, bp 151; n-pentyl propionate, bp 169

[luvbio]

TY

[chem1s3]

You're welcome