A mixture contains two coloured substances, P and Q, extracted from flower petals.
Separate samples of the mixture are analysed by paper chromatography. Solvent X is used for one sample and solvent Y for the other. P and Q are equally strongly attracted to the chromatography paper.
| Substance | Solubility in solvent X | Solubility in solvent Y |
|---|---|---|
| P | high | low |
| Q | low | high |
Predict which substance will travel further in each solvent. Explain your answer.
113 exam-style questions on AQA GCSE Chemistry 8.1 Purity, formulations and chromatography, covering 8.1.1 Pure substances, 8.1.2 Formulations, and 8.1.3 Chromatography. Each one has a worked solution and a mark scheme showing where the marks go.