[matts1212]

Hello,
I have to write a lab report and there are also some problems to answer.
I cannot find an answer to this one:

Describe a simple method how the composition of the gas phase can be determined.
Hint: Think about how the purity of liquids is usually determined in organic chemistry.


I think the hint refers to the refractive index but I don't know how I can use it to determine the composition.

I know some analytical methods that could be use but they seem to me not simple enough.

PS. It is Physical Chemistry Lab but I think I posted it in a right section, since it is somehow analytical problem. 

[Borek]

What did the gas phase contain? Was is a simple two component mixture, or something more complicated?

[matts1212]

It is a general question, it is not really connected to experiment.

I've no clue what should I answer. I can only came up with methods that are too sophisticated.

[Borek]

If there is nothing known about the gases present, I don't see how to determine the composition "simply" - whatever it means.

[Arkcon]

Hint: Think about how the purity of liquids is usually determined in organic chemistry.[/i]

I think the hint refers to the refractive index but I don't know how I can use it to determine the composition.

I don't recognize what you mean.  Sire, we could use refractive index, in some situations.  But determining the purity of a liquid, is that the only way, or best way?