Chromatography

• Describe how paper chromatography is used to separate mixtures of soluble coloured substances using a suitable solvent
• Interpret simple chromatograms to identify

(a) unknown substances by comparison with known substances

(b) pure and impure substances

• Describe how paper chromatogrphy is used to seperate mixtures of soluble colourless substances, using a suitable solvent and a locating agent. Knowledge of a specific locating agent is not needed
• State and use the equation Rf