Chemistry How Can You Determine Which Layer Is Which Without Using Densities?

Thread starter fishfish
Start date Oct 23, 2009
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Molecular Polarity

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Determining which layer is which without using densities can be achieved through various methods, including analyzing boiling and freezing points. However, the most straightforward approach is to add a drop of water to the mixture. This method reveals which layer mixes with the water, indicating the aqueous layer versus the organic layer. The organic layer is typically already saturated with water, while the aqueous layer can be diluted. This technique provides a clear and practical solution for layer identification.

Oct 23, 2009

fishfish

How would you determine which layer is which without using the densities?

Last edited: Oct 24, 2009

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Oct 24, 2009

PhaseShifter

I can think of several ways.

Boiling point
freezing point

But the easiest by far is to just add a drop of water and see which layer it mixes with, since you have an organic layer already saturated with water, and an aqueous layer you can always dilute.

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