C2.1.7 - Purification and checking purity Flashcards
1
Q
What are the advantages of using thin-layer chromatography instead of paper chromatography?
A
- It is quicker
- It is more sensitive
- There is a larger range of stationary phases and mobile phases to choose from
2
Q
How do you separate insoluble and soluble substances?
A
Dissolving followed by filtration
3
Q
How do you separate a solute dissolved in a solvent?
A
Crystallisation to obtain the solute, simple distillation to obtain ten solvent
4
Q
How do you separate 2 or more substances in the liquid state?
A
Fractional distillation
5
Q
How do you separate coloured soluble substances?
A
Paper or thin-layer chromatography
