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Thursday, July 28, 2011

chromatography!

Chromatography is a physical separation method in which the components of a combination are separated by difference in their distribution between two phases, one of which is stationary and the other is mobile, moving in a definite direction.


The results are due to the different solubilities of every substance. More soluble substances would travel faster on the chromatography paper. 



Rf value=Distance moved by substance/Distance moved by the solvent

Same dyes/substances will have the same Rf value under identical conditions, which is how substances can be identified through their Rf values.


I was absent on the day, so I borrowed data from my friend:


2.9/9.9= 0.292(to 3sf)

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