Water is considered a polar molecule because it has a perceptible electromagnetic field that's grouped around a positive and a negative pole, like a magnet. This is a result of the special way that the atoms of a water m... More »

Acetone is considered a polar molecule because it contains an imbalance of electrons. Acetone shares some properties with nonpolar molecules, such as being water soluble. More »

The oxygen atom in a water molecule carries a partial negative charge, and the two hydrogen atoms carry a partial positive charge. Oxygen is more electronegative than hydrogen, so in a water molecule, the bonding electro... More »

Lipids are insoluble in water because they are nonpolar, and water is a polar molecule. Nonpolar substances are insoluble in polar substances, and polar substances are insoluble in nonpolar substances. More »

Diffusion is the spontaneous movement of any type of particle or molecule from an area of high concentration to an area of low concentration, while osmosis is the diffusion of water across a semi-permeable membrane. Osmo... More »

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The polar end of the phospholipid molecule, which contains a phosphate group and an alcohol, is attracted to water, or hydrophillic, and water-soluble. The opposite end of the phospholipid contains the fatty acids, which... More »

A hydronium ion is formed when a positively charged hydrogen ion bonds with a molecule of water through a coordinate covalent bond. In this coordinate covalent bond, the oxygen from the water molecule uses both of its el... More »