Like Dissolves Like - Demonstration

This video is owned by the Journal of Chemical Education. Copyright © ACS Division of Chemical Education, Inc. Only subscribers to JCE Web Software can view this video. Allowed uses

Summary

Carbon tetrachloride, water and hexane are used to show how polarity and density affect the interactions between substances. The 24 thumbnail images summarize the content of the video. Click an image to see the image gallery.

Narration

Nonpolar carbon tetrachloride is poured into a test tube. When a nonpolar colored solid is added, the solid dissolves in the carbon tetrachloride.

When polar water is added to the test tube, it forms a layer on top of the carbon tetrachloride, since water is immiscible with, and less dense than carbon tetrachloride.

When nonpolar hexane is added to the test tube, it forms a layer on top of the water, since hexane is immiscible with, and less dense than water.

When the test tube is vigorously shaken, the two nonpolar liquids form a single layer at the bottom of the test tube, and the polar water layer sits above this layer.

Discussion

There are two approaches to the topic "Like Dissolves Like". This one provides a movie that demonstrates the concepts. The next section provides a series of multimedia experiments that will encourage you to think actively about the concepts.

Keywords

Noncovalent Interactions | Physical Properties | Precipitation / Solubility

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Like Dissolves Like - Demonstration
Solutions


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