[toadesque]

I made this graph:



First of all my book said that it should be obvious that the fractional distillation resulted in a better separation of the two liquids in my unknown. But to me both the simple and fractional distallation graphs look the same to me! Anyway....

It says that I should be able to estimate the boiling points of the two components in my unknown mixture based on the graph.  The temp. should level off on two regions of the graph.

I don't see it though?

These are the possible compounds:

Hexane (BP 69 degrees celsius)
Cyclohexane (80.7)
Heptane (98.4)
Toluene (110.6)
Ethylbenzene (136)

I'm guessing Hexane and Cyclohexane but don't think my reasoning is correct.

[KritikalMass]

That graph isn't very accurate. If you go to pg 3 of this pdf you will see an example of what a fractional distillation graph "should" look like
http://www.xula.edu/chemistry/department/organic/Notes/11FracDist.pdf

Could you please post the data you collected? I want to try something out.

Thanks!

[KritikalMass]

  Sure would be nice if I could get ahold of that data you collected