gator science

active adventures in lower school science

Paper Chromatography Lab

on December 6, 2013

Second Grade students used paper chromatography to separate the black ink line on a paper towel into three distinct colors.  Students compared the rate of movement between a cup of water to a cup of vinegar.    Students asked why the colors separated differently and came up with some interesting ideas.   The black ink is made up of different colors or pigments.    Each pigment is a different kind of chemical so it may act differently moving up the paper towel.  We loved the bright colors that appeared on the paper towels.   Fifth graders will do a series of chromatography experiments when they study chemistry later in the year.

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