Mixtures (AQA GCSE Chemistry Combined Science): Flashcards

Different substances not chemically joined together

By physical processes (filtration, evaporation, chromatography, distillation)

A substance made of only one type of atom

Atoms of different elements chemically joined together

Insoluble solid from liquid

Soluble solid from liquid

The water (solvent) evaporates away, leaving the solid

Mixtures of coloured compounds

Inks, dyes, and colouring agents in food

$R_f = \frac{\text{distance moved by compound}}{\text{distance moved by solvent}}$

Always the same for a particular compound (under same conditions)

Miscible liquids with different boiling points

100°C

78°C

Liquids that mix together easily without separating