Essential Chemistry for IGCSE - Particles And Purification (Section 3 - No. 4)
What does the 'R_f' value represent in paper chromatography?
The ratio of solvent to solute
The ratio of the distance traveled by the solute to the distance traveled by the solvent
The ratio of the solute to the solvent
The rate of flow of the solvent.
Explanation
The R_f value is a ratio of the distance traveled by a substance to the distance traveled by the solvent front.
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