states of matter and mixes

• Chromatography

  mobile phase - molecules can move. always liquid or gas

  stationary phase - molecules cant move. always solid or thick liquid
• components in the mixture separate during the mobile phase.
• they end in different places because each of the chemicals will spend different amounts of time dissolved
• how fast it moves depends on how the chemicals distribute between the two phases
• Rf value is

  distance travelled by substance / distance travelled by solvent
• Rf values always lie between 0 and 1