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Solubility diagram of two partially miscible liquids

Solubility diagram of two partially miscible liquids

Item no.: P3030501

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A number of different mixtures of phenol and water are prepared and heated until complete miscibility is achieved. As the mixtures cool, two-phase systems form at certain temperatures which are recognisable by the appearance of turbidity. Plotting separation temperatures against compositions of the mixtures gives the separation curve.


  • Good and reproducible results due to temperature control in the experiment.


  1. Plot the separation curve of the phenol / water binary system and prepare a temperature / mass fraction diagram.
  2. Determine the critical separation point.

What you can learn about

  • Binary system
  • Miscibility gap
  • Mixed phase
  • Coexisting phase
  • Raoult's law
  • Critical dissolution temperature

Necessary accessories

  • Precision balance 620g/0.001g
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Required Accessories
Document     Filesize
p3030501e.pdf Experiment guide, English 223.42 KB

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