Chromatography
- Created by: MattJG
- Created on: 15-12-16 20:25
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- Chromatograp-hy
- Used to separate substances in a mixture.
- 2 phases
- Stationary - where molecules can't move. Solid or thick liquid.
- The stationary phase is the chromatography paper.
- Mobile - where molecules can move. Always a liquid or gas.
- The mobile phase is the solvent.
- More soluble ones will spend more time in the mobile phase and so will travel further up the paper.
- Stationary - where molecules can't move. Solid or thick liquid.
- Rf Value
- Distance travelled by substance / Distance travelled by solvent
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