1. Chromatography Separating different pigment solutes from food coloring

2. How it works  Solvent (the water or other liquid) particles are attracted to the paper particles and the liquid moves up the paper  Dye particles are attracted to both paper particles and liquid particles.  The dye particles are pulled up by the liquid, but remain on the paper.

3. water time

4. Cause of the separation  Blue particles end up on top because they traveled faster up the paper.  Both types of dye particles are attracted to water and paper.  So, is the speed of the movement due to greater attraction to the liquid or greater attraction to the paper?

5. Results of Additional Experiments Paper towel, newsprint, and orange paper all reversed the color order. Yellow went farther than blue. Alcohol, milk, and soda all had the same color order as the initial experiment. Blue went farther than yellow. Origin of green

6. Hypotheses #1 and #2: Supported or Rejected?  #1 The blue particles are more attracted to water so they move faster. Rejected The different liquids did not change the color order.  #2 The yellow particles are more attracted to paper so they move slower. Supported Changing the paper changed the color order.

7. How it works-continued  As the water particles move past the dye, the blue particles are moved more easily because they are less attracted to the paper.