Chemistry Experiment : Mixtures And Pure Substances

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Experiment #3 - Mixtures and Pure Substances HYPOTHESIS: My hypothesis is that none of the Crayola colors are pure colors because they are a mixture of other color components. PURPOSE: The purpose of the experiment is to determine the specific types of pigments found in water-soluble marker pens by using paper chromatography and water as a solvent. RAW MATERIALS:  coffee filter  pencil or other rod to use to hang the paper from  different colored water-soluble marker pens (Vis a Vis pens and Crayola water soluble work well. Be sure that it is water soluble. Be sure to test any green, water soluble inks that you have.)  water  glass SAFETY CONSIDERATIONS: • Get foreign particles in your eyes so wear clear safety glasses. • Get cuts from using scissors when cutting the coffee strips so keep eyes on fingers. • May poke yourself accidentally with the pencil so again keep eyes on task at hand. EXPERIMENTAL PROCEDURE: 1. Cut strips from coffee filters that are about ½ inch wide and the width of the filter. Make 6 or 8 of them with two or three strips coming from each filter...

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