Chromatography (OCR GCSE Chemistry A (Gateway Science Suite)): Flashcards

Method to separate mixtures into individual compounds

Identify chemicals in a mixture

Mixture of chemicals you want to separate

Solid material that stays still during experiment

Liquid or gas that moves through stationary phase

Move slowly (shorter distance)

Move quickly (longer distance)

Chromatography paper

Solvent (e.g. water or alcohol)

Shorter distance (more strongly attracted)

$Rf = \frac{\text{Chemical distance}}{\text{Solvent distance}}$

Always the same