gator science

active adventures in lower school science

Experimenting with Chromatography

on February 6, 2013

Students asked questions and tested different materials today using a standard paper chromatography system.   One group tested permanant ink with different solvents.  Another group found they could seperate the Expo white board marker with the most dramatic colors using vinegar instead of water.

Different Solvents: water, salt water, vinegar, rubbing alchohol, baking soda

Different Mediums: chromatography paper, coffee filter, construction paper, paper towel, fabric.

Ink is a mixture of different pigments that can be seperated easily by paper chromatography.

Students were asked whether this lab was an example of cyclic or domino causality.  Is this a physical or chemical change?

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