Chromatography 0.0 / 5 ? ScienceChemistryGCSEAQA Created by: lily sassCreated on: 10-04-13 18:42 What happens to the colors when the solvent rises? They are carried up and separated. 1 of 7 What speeds do the chemicals travel in when in a mixture and alone? They travel at the same speed. 2 of 7 What is Chromatography also used for? Drugs and medicines. 3 of 7 What do chemists use to save time analysing chromatograms? Retention factor (Rf) 4 of 7 How do you calculate the retention factor? Rf= Distance moved by substance / Distance moved by solvent front 5 of 7 What does thin-layer Chromatography use? A glass plate coated in a thin layer of absorbent materials. 6 of 7 Why is the thin-layer Chromatography better/worse than paper Chromatography? It is quicker but more expensive. 7 of 7
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