Phase Equilibria

Question 0

What is the partition coefficient? What is it’s associated eqn?

Answer 0

The ratio of the concentrations of a solute in two immiscible/ slightly miscible liquids, or in two solids, when it is in equilibrium across the interface between them.
K = [solute]solvent A ➗ [solute]solvent B

Question 1

What are liquids which don’t mix with each other said to be?

Answer 1

Immiscible

Question 2

What is chromatography?

Answer 2

A technique for the separation of a mixture by passing it in sol in which the components move at diff rates

Question 3

What do all chromatographic methods involve?

Answer 3

A mobile phase moving over a stationary phase

Question 4

Why does separation occur during chromatography ?

Answer 4

Because the substances in the mix have diff partition coefficients between the stationary and mobile phases

Question 5

In gas liquid chromatography what is the mobile and stationary phase?

Answer 5

Mobile = a gas (the carrier gas)
Stationary= a high boiling pt liquid held on an inert! finely powdered support material