This topic contains a solution. Click here to go to the answer

Author Question: Explain why a vacuum distillation apparatus should be checked for leaks before the material to be ... (Read 58 times)

lracut11

  • Hero Member
  • *****
  • Posts: 536

Explain why a vacuum distillation apparatus should be checked for leaks before the material
  to be distilled is placed in the flask.



Question 2

At low pressures such as used in vacuum distillation, reducing the pressure by half reduces a
  boiling point by about 10. If a compound boils at 180 at 10 mm Hg, what would be its
  approximate boiling point at the following pressures?
  (a) 15 mm Hg
  (b) 2.0 mm Hg




Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

bookworm410

  • Sr. Member
  • ****
  • Posts: 341
Answer to Question 1

The material to be distilled will itself have vapor pressure. There is also the possibility that the
material to be distilled will contain some residual low-boiling solvent that will provide signifi
cant vapor pressure. Therefore, inability to draw a vacuum may be due to a leak or it may be
due to the vapor presure from the material in the flask. With an empty flask, the inability to
draw a vacuum must be due to a leak.



Answer to Question 2

(a) 185
(b) 156





lracut11

  • Member
  • Posts: 536
Reply 2 on: Aug 23, 2018
Thanks for the timely response, appreciate it


Hdosisshsbshs

  • Member
  • Posts: 315
Reply 3 on: Yesterday
Excellent

 

Did you know?

Chronic necrotizing aspergillosis has a slowly progressive process that, unlike invasive aspergillosis, does not spread to other organ systems or the blood vessels. It most often affects middle-aged and elderly individuals, spreading to surrounding tissue in the lungs. The disease often does not respond to conventionally successful treatments, and requires individualized therapies in order to keep it from becoming life-threatening.

Did you know?

Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.

Did you know?

Carbamazepine can interfere with the results of home pregnancy tests. If you are taking carbamazepine, do not try to test for pregnancy at home.

Did you know?

Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.

Did you know?

Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.

For a complete list of videos, visit our video library