Question

12 pts) Lab 3: Distillation; Introduction into Gas Chromatography Consider the apparatus set up shown below for questions 10- 12. All joints are properly connected, hoses are properly attached to the sink and heat is available for the round bottom flask (not shown). water in 10)3 pts.) Junior chemist James performs a distillation with the apparatus as shown and what happened to the other only has 10% recovery when everything has evaporated. 90%? 11)3 pts.) Junior Chemist James also notices that the distillate coming out is hot. Why is the distillate hot? 12)3 pts.) After running the GC/MS Junior Chemist James noticed that the separation of components was very poor. What can James do to optimize his distillation without doing it multiple times?

Answer 1

[10]

Remaining 90 % is evaporated due to it didn’t condensed (Convert gas to liquid) in the condenser and evaporated.

[11]

There may two reasons for that (1) length of condenser is small so compound didn’t condensed properly (component doesn’t cooled or not get enough time for heat transfer from component to circulating water) (2) James heated the at much higher than boiling point.

[12]

The boiling point of the two components is very close or James heated the sample higher than the boiling point of the sample.