Caleb Posted March 2, 2010 Share Posted March 2, 2010 I am homeschooled and for my at home chemistry course I am learning about the melting points in various chemicals. As a bonus in the material, I am supposed to try to supercool Cetyl Alcohol and Palmitic Acid. But I can't seem to get the chemicals below their freezing points without freezing them. Link to comment Share on other sites More sharing options...
John Cuthber Posted March 3, 2010 Share Posted March 3, 2010 To get things to supercool they need to be free from dust etc. Filtering hot liquids can be a pain in the neck but these two should be OK. Heat them to well over their melting points and filter the liquids, then leave them undisturbed (with a thermometer in them) and see if they supercool. Link to comment Share on other sites More sharing options...
Caleb Posted March 3, 2010 Author Share Posted March 3, 2010 To get things to supercool they need to be free from dust etc. Filtering hot liquids can be a pain in the neck but these two should be OK. Heat them to well over their melting points and filter the liquids, then leave them undisturbed (with a thermometer in them) and see if they supercool. I only have about 5 grams of both of the substances so I used a capillary tube instead. Does that change anything? Link to comment Share on other sites More sharing options...
John Cuthber Posted March 4, 2010 Share Posted March 4, 2010 It still needs to be very clean for the liquid to supercool. How did you clean the capillaries? Link to comment Share on other sites More sharing options...
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