Polar mixes well with polar. Nonpolar mixes well with
nonpolar.
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Polar molecules have charges that non-polar molecules do not
have. It is the reason why non-polar molecules can move through the
lipid bilayer quicker than the polar molecules.
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Polar solvents will dissolve ionic or polar solutes. This is due
to the solubility rule that states that like dissolves like. So a
polar solvent will not dissolve non-polar solutes.
