Chromatography

• How is chromatography used? 


  To separate mixtures of substances that are soluble in the same solvent
• What is used to prevent evaporation of volitile solvents?

  A lid
• What is drawn on the paper?

  A pencil line is drawn because ink can dissolve in the solvent and run. The solvent must not touch the mixture spot of colour. (Or else they will mix up)
• What happens when the colour moves?

  The solvent moves
• What does the solvent move through? 


  It moves through paper
• What is a solvent? 


  The mobile phase
• What is paper chromatography? 


  stationary phase
• What do different substances have?

  Different solubilities in the solvent (mobile phase)
• What else do different substances have?

  Different attractions to the paper (stationary phase)
• Where are they carried to?

  Different differences
• What are dyes called?

  Spots