Paper Chromatography

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

1.) What colors are mixtures?
  answer: blue (green + yellow) , purple (red + blue) , orange ( red + yellow). 

2.) What substances could be used to separate a mixture?
  answer: bleach (chlorine), water with three drops of soap, paint remover acetone (nail polish remover) clear, salt water, alcohol, hydrogen peroxide, and ammonia.

3.) What is paper chromatography? 
   answer: chromatography is a method for analyzing complex mixtures (such as ink) by separating them into the chemicals from which they are made. 

Question / Hypothesis-

1.) Are colors mixed to make other colors?
  answer: yes for an example blue and red makes purple.

2.) Can mixed colors separate into their component colors?
  answer: no

3.) Can green and black separate into their own component colors?
  answer: no

4.) Which colors will separate out?
  answer: maybe the light colors like baby blue, pink, yellow, and etc.

Materials-
> Goggles
> Green and Black markers
> Strips of filter paper
> Metric ruler
> Plastic cup
> Rubbing alcohol 
> Tape
> Pencil
                   

  Procedure:
1. Using the ruler, cut the filter paper into long rectangular strips about 3cm x 10cm (you need two).

2. Measure 0.5cm 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 the bottom*

4. Pour rubbing alcohol into a plastic cup to a depth of 1/2 cm. Then, rest the pencil on the rim of the cup so that the end of the pencil strip, when the ink mark is just barely in contrast with the alcohol.

5. Observed for about 8 minutes.

6. Let the strip dry by taping it to a piece of paper provided. put group names, period, and iPod number on the sheet.

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

                                                                         
Data table:  Nothing changes during it.

Analysis and Conclusion-

1.) What appeared on the filter paper? Describe the results.
  answer: for the water and alcohol test nothing happened.

2.) What did the results indicate about the black ink? What classification of matter could you give the ink?
  answer: it was a substance because it didn't separate. 

3.) Is chromatography a useful separation method for ink mixtures? Explain based on results. 
  answer: No because i got no separation if i had better solvent. it didn't seem to work. It seem like it needed more results.

4.) If you alter the experiment to test another condition or factor, what would you change or test?
   answer: we need more solvent so it can change and you may be able to change the water and expo marker.

Post Lab:
How does paper chromatography work? A: Preferential adsorption of chemical compounds (gases or liquids) in an ascending molecular weight sequence. * separates by weight or the molecular*