Equilibria Between Different Phases Flashcards
What is the factor that will affect the results
Temperature dependent
Which solute and which solvents used
What is a partition coefficient
Two Immiscible liquids mixed plus solute which dissolves in both
Ending up being in both of the liquids
The partition coeffiencient isn’t affected by
Adding more solute
Increasing volume solvents
What is solvent extractions
Partition can be used to purify and extract a desired product from the reaction mixture
What does the method depend on
The desired material being more soluble in one liquid as it is in the other
How is the mixture separated
Using a separating funnel
Lower layer run off first into one container then the upper layer run off into another container
Hat is another used of solvent extraction in terms of water soluble…….
Used to purify water soluble organic acids using a suitable organic solvent
Why is chromatography used
To separate substances between two phases
What are the two phases in chromatography
Mobile phase = is the solvent used (flows thro the stationary phase and caries components of the mixture with it )
Stationary phase = water present on absorbent chromatography paper
Why is it the mixture separates
Different components in it travel at different rates therefore sep
What is the distance travelled relative to the solvent called and it’s equation
Rf value = distance travelled by compound/distance travelled by solvent
What is the other form of chromatography and explain it
Gas-liquid chromatography
Mobile phase = unreactive gas (helium) aka carrier gas
Stationary phase = liquid held onto a solid contained coiled up in an oven
Speed the vaporised gasses after injection to oven is the seperation
