Rf calculation - Distance ink travels/Distance solvent travels, Rf numerical value - Between 0-1, Solvent - The liquid the ink dissolves into, Pencil - The start line must be drawn in _________, Only 1 dot on chromatogram - Pure substance, More than one dot on chromatogram - Mixture, Stationary phase - Chromatography paper, Mobile phase - Solvent, If the ink spots travel the same distance - They are the same substance (and have same Rf), Why might a dye stay on the start line after chromatography? - It is insoluble in the solvent,

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