A chemist analyses a yellow colouring compound used in a sports drink by paper chromatography. The same type of paper is used with two different solvents. The compound has an Rf R_f\,Rf value of 0.62 in the first solvent and 0.28 in the second solvent.
Explain how the compound's distribution between the two phases must differ in the second solvent to account for its lower Rf R_f\,Rf value.
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.