Observing the Lowering of a Melting Point—Microscale Chemistry

This Observing the Lowering of a Melting Point—Microscale Chemistry lab resource also includes:

Can a solid's melting point be lowered without placing it in an aqueous solution? Discover the surprising truth when chemistry scholars combine hydroxybenzene and menthol crystals during a microscale experiment. A well-written procedure and supporting materials make for easy planning and preparation on your part.

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CCSS: Adaptable
NGSS: Adaptable
Instructional Ideas

  • Perform the experiment, then have pupils design their own to test the properties of other organic solids
  • Demonstrate proper sampling of the phenol while pupils observe; have individuals demonstrate the skill as a lab practical grade
Classroom Considerations

  • Although the experiment is performed in microscale, hydroxybenzene is still quite hazardous; be sure learners are using good lab safety sense

  • The lab presents a fascinating phenomenon for pupils to observe and collaborate to explain
  • Microscale experiments allow for easier set up and clean up

  • None
Common Core