Water is a polar molecule. No, water molecules don’t look like tiny polar bears. Being polar means that one side of the molecule is more negative whereas the other side is more positive. In water the oxygen atom has a slightly negative charge and the hydrogen has a slightly positive charge. If something is hydrophobic it repels water; these molecules are water hating. Hydrophobic molecules are nonpolar and so they cannot form bonds with water. In fact, when a hydrophobic substance and water meet, they separate. The canola oil in the picture above is hydrophobic. As you can see, the water and the oil did not mix; the oil sits on top of the water.


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