Asked by Peter

Most dirt on your body is nonpolar, and is trapped in oil residue on your skin.  What type of liquid is oil? (polar or nonpolar)  show your calculations.
Answered by drwls
You don't really need calculations to answer this. A discussion of the role of soap/detergents in dissolving (nonpolar) oil in (polar) water can be found at
http://www.elmhurst.edu/~chm/vchembook/554soap.html
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