CHROMATOGRAPHY - LAB

PROBLEM:
How can you find out which pen wrote a particular note?

HYPOTHESIS:

MATERIALS:
6 pens, 6 filter paper strips, beaker, water, tape, plastic rods

1. Using filter paper, cut out 6 3" rectangular segments.

2. Number each strip of filter paper at the top using pencil.

3. Draw a line 2 cm from the bottom of each strip using pencil.

4. For each of the strips, use the corresponding "evidence" marking pen to draw a line over the pencil line.

5. Tape one end of the strip to a plastic rod.

6. Using the corresponding number "evidence" pen draw a line 2 cm up from the bottom.

7. Pour 75 mL of water into a 250 ml beaker.

8. Suspend the plastic rod over the beaker.

9. The filter paper strip should be barely touching the water.

10. Remove the filter paper and rod from the beaker when the water line is just below the rod.

CONCLUSION: