Answer to Question #131649 in Inorganic Chemistry for Davidmillz

Question

The solution of a compound is spotted at distance 1.0cm from the base of a 20cm long chromatographic plate. Upon elution the solvent front got to a place 0.5cm from the top of the plate. If the compound moves three quarter way up the plate, the Rf value of the compound is

Answer 1

The retention factor, or Rf, is defined as the distance traveled by the compound divided by the distance traveled by the solvent. Since these factors are difficult to keep constant from experiment to experiment, relative Rf values are generally considered.

Rf Value is = 20-1 / 20+ 0.5

Rf Value Is = 19 / 20.5

= 0.9 Ans .