Mixtures (OCR GCSE Chemistry A, Combined (Gateway Science Suite)): Flashcards

Different substances not chemically joined

Physical processes (no chemical reaction needed)

Substance made of only one type of atom

Atoms of different elements chemically joined

Insoluble solid from liquid

Soluble solid from liquid

Water evaporates away, not the solution

Coloured compounds (inks, dyes, food colouring)

$R_f = \frac{\text{compound dist.}}{\text{solvent dist.}}$

Always same if chromatography done the same way

Water and miscible liquids

Liquids have different boiling points

100°C

78°C

Mix easily without separating into layers