Chromatography Lab

Groups use alcohol and chromatography paper to separate the color components of black ink. The purpose of the activity is to allow the class to become aware that mixtures exist in hidden places. 

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Instructional Ideas
  • Let the class brainstorm other substances that may have hidden components within them
  • Along with using a permanent marker, use a washable black marker
Classroom Considerations
  • The activity is usually done as part of a color/light unit; be sure to make the connection to hidden components within a mixture
  • The fourth in a series of nine activities
  • Includes assessments to be done before, during, and after the activity
  • The lab worksheet provides background information about what is happening
  • None