Tiarra Santiago

      H-18

Lab Objective: Create a process for separating a mixture, specifically an ink mixture.

1.) What colors are mixtures?

2.) What substances could be used to separate a mixture?

3.) What is Paper Chromatography?

Hypothesis Questions:

1.) Are colors mixed to make other colors?

2.) Can mixed colors separate into their components colors?

3.) Can black separate into its component colors?

Which colors will separate out?

Materials

•Goggles

•Green and Black Markers

•Strips of Filter Papers

•Metric Ruler

•Plastic Cup

•Rubbing Alcohol

•Tape

•Pencil

Procedure:

1.Using the ruler, cut the filter paper into long, rectangular strips, about 3 cm x 10cm. *You need 2*

2.Measure 0.5 cm from the bottom of the paper strip and draw a horizontal line with your pencil across the width of the strip. Then, use the black marker to make a dot on the pencil line.

3.Tape the paper strip around the pencil so that the very bottom of the strip touches the alcohol.

**Do not let ink dot touch alcohol

4. Pour rubbing alcohol into a plastic cup to a depth of ½ cm. Then, rest the pencil on the rim of the cup so that the end of the pencil strip with the ink mark is just barely in contact with the alcohol.

5. Observe for about 8 minutes.

6. Let the strip dry by taping it to a piece of paper provided.  Put group names, period, and ipod # on the sheet.

7. Repeat the process for the other solution for the same marker.

Data Table:

Observations	Observation at 3 minutes	Observation at 6 minutes	Dry test strips
(Name) black marker w/ alcohol
Black marker with other solution
Black marker w/ H2O

Analysis and Conclusions:

1.) What appeared on the filter paper?  Describe all results.

2.) What did the results indicate about the black ink? *What classification of matter could you give the ink?

3.) Is chromatography a useful separation method for ink mixtures? Explain based on your results.

4.) If you could alter the experiment to test another condition or factor, what would you change or test?