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→Method
===Method===
====Detecting Purity====
#Take a piece of [[chromatography]] paper of [[width]] 2cm and [[height]] 10cm.
#Using a ruler draw a line with pencil across the [[width]] 1cm up from the end.
#Add a dot of the unknown sample on the pencil line.
#Suspend the [[chromatography]] paper in a suitable [[solvent]] just below the pencil line with most of the paper above the [[solvent]].
#Wait until the [[solvent]] stops rising up the paper.
#If there is more than one dot on the [[Chromatogram]] then the [[substance]] was [[impure]]. If there is only one dot on the [[Chromatogram]] the [[substance]] was [[pure]].
====Identifying Chemicals by Comparison====
The [[chromatogram]] from an [[experiment]] can be compared against [[chromatogram]]s of known [[chemical]]s to identify the [[chemical]]s in the original sample.