During a thin-layer chromatography (TLC) analysis of a wild berry extract, the solvent front advanced a distance of 14.6 cm from the baseline. A specific anthocyanin pigment in the extract has a recorded Rf R_f\,Rf value of 0.43 in this solvent system.
Calculate the distance from the baseline to the centre of this pigment spot. Give your answer to two significant figures.
107 exam-style questions on Edexcel GCSE Chemistry 3.2 Methods of separating and purifying substances, covering 3.2.1 Pure substances and mixtures, 3.2.2 Techniques for separating mixtures, 3.2.3 Paper chromatography and Rf values, and 3.2.4 Making water potable. Each one has a worked solution and a mark scheme showing where the marks go.