Critical Point – 4C50.00

Critical Opalescence – 4C50.20

Crit Opal1_ 4C5020Crit Opal4C50.20-2

Crit Opal4C50.20-3 Crit Opal4C50.20-4

  • To show the refractive index with phase change.
  • A mixture of hexane and methanol is heated above 42.4 degrees C.
  • The mixture is clear and appears as one liquid.
  • Let the mixture cool to 42.4 degrees C and observe the critical opalescence at the transition temperature by shining a laser beam to the mixture.
  • As the mixture continues to cool the two liquids will separate into distinct layers.

Location: Jacobs B122 – Shelf 279