Paper chromatography

• What is the purpose of paper chromatography?

  To separate substances in a mixture
• What type of processes are all separation techniques, including paper chromatography?

  Physical processes
• What does paper chromatography separate substances based on?

  Different solubilities
• How would you identify which colored pens contain mixtures?

  By using paper chromatography
• What is the special paper used in chromatography called?

  Chromatography paper
• Why do we draw a pencil line on chromatography paper?

  To prevent the line from dissolving
• What is a solvent in the context of chromatography?

  A liquid that dissolves substances
• What happens to the ink when the solvent moves up the paper?

  The ink dissolves and travels with the solvent
• What do we call the paper in chromatography?

  The stationary phase
• What do we call the solvent in chromatography?

  The mobile phase
• What indicates that a color is a pure compound in chromatography?

  It produces a single spot
• How does the solubility of a substance affect its movement in chromatography?

  More soluble substances travel further
• What is the significance of the RF value in chromatography?

  It helps identify a compound
• What are the steps involved in performing paper chromatography?

  1. Draw a pencil line on chromatography paper.
  2. Place dots of different colors on the line.
  3. Immerse the paper's bottom in a solvent.
  4. Allow the solvent to move up the paper.
  5. Observe the separation of colors.
• What are the key differences between pure compounds and mixtures in chromatography?

  • Pure compounds produce a single spot.
  • Mixtures may separate into multiple spots.
  • Solubility affects the distance traveled.
• What factors influence the results of paper chromatography?

  • Type of solvent used
  • Solubility of the substances
  • Nature of the stationary phase