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Chemistry LibreTexts

Observed Rotation

[ "article:topic", "authorname:ggunawardena" ]
  • Page ID
    40785
  • Observed rotation (symbol: α) of a sample of a compound is the angle by which it rotates the plane of polarized light, measured using the polarimeter.  Observed rotation of a sample of a compound depends on the

    1. concentration, if a solution is used for the for the experiment, or density if the sample is neat
    2. solvent, if a solution is used for the experiment
    3. length of the sample tube
    4. temperature
    5. wave length of the light.

    see also specific rotation