Non-polar compounds - insolubility

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HWC

• A non-polar molecule has uniform distribution of electrons. • Non-polar compounds like fatty acids in lipids have a high proportion of carbon and hydrogen. • Lipids possess no charge or partial charge. • Lipids are not attracted to water molecules. • Lipids are not soluble in water. Phospholipids - water barrier ■ Lipids are important components of the cell membrane. ■ Lipids separate two watery solutions without dissolving. ■ The hydrophobic, non-polar lipid tail moves away from the water inside and outside of the cell. ■ The hydrophilic, polar head mixes with water. ■ A double layer of phospholipids in cell membranes forms a waterproof barrier.

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