Chromatography of Pigments Write Up

Introduction:

• Explain paper chromatography

• Describe the Greek origins of the word chromatography

• Explain how paper chromatography is used

• Explain how chromatography separates liquids into their individual components

• Explain the purpose of the paper

• Explain what is used as the developer

• Explain how the separation process actually takes place

• Explain the movement of the different components up the paper

• Tell what a chromatogram is

• What is the R_f value and give the formula for obtaining this value

• How do scientists use R_f values

Hypothesis:

• Write a statement explaining the lab objective of using paper chromatography to separate pigments

Materials:

• In sentence form, write a statement listing the materials required for this lab.

Procedure:

• In paragraph form, write the procedures for completing this lab

Results:

• Include your chromatography strip. 

• Complete Data Table 1

• Write out and answer the questions on the lab. Remember to write and underline the question, but do NOT underline the answer

Conclusion (Write in paragraph form):

• Restate your hypothesis
• Tell the distance traveled by the solvent and by each color
• Compare the R_f value for each color and explain any similarities and differences
• Explain why some colors moved further than others
• Explain any errors you might have made in lab that could have affected your results