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Thursday, September 26, 2019

1.12- understand how to use the calculation of Rf values to identify the components of a mixture



For each dye, the Rf Value is calculated. To do this, two distances are measured:
-        The distance between the baseline and dye (centre)
-        The distance between the baseline and the solvent front (how far the solvent travelled from baseline)
Rf value is always between 0 and 1
The more soluble a dye is, the higher its Rf value will be. An insoluble dye Rf value is equal to 0










Use the equation:
Rf= distance of dye from baseline/distance of solvent front from baseline


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