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Why oil and water do not mix?

by bgq
Tags: water
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Feb17-13, 10:01 AM
P: 144

Why do oil and water not mix? We know that some liquids mix together while others not, I am looking for the reason of this.

Thanks to any replies
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Feb17-13, 11:01 AM
P: 12,037

The attraction between two water molecules is much stronger than the attraction of a water molecule and an oil molecule (or two oil molecules), so they tend to stay together.

You can mix them with soap (as a simplified model, long molecules where one side is attracted by water molecules and the other sticks to oil molecules).
Feb19-13, 05:47 AM
P: 144
Thank you very much.

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