CHEMISTRY · Single correct · AP · Chemistry · Properties of Substances and Mixtures · Properties of Substances and Mixtures
Problem
In thin-layer chromatography (TLC), the Rf value of a spot is usually reported. Which of the following best defines the Rf value?
(a) The ratio of the distance the compound travels to the total length of the TLC plate
(b) The ratio of the distance the compound travels to the distance the solvent front travels
(c) The ratio of the distance the solvent front travels to the distance the compound travels
(d) The ratio of the difference between the solvent‐front and compound distances to the solvent‐front distance (i.e., dfrontdfront−dcompound)