Like Dissolves Like - Demonstration - Introduction
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.
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