What kind of force existed between the molecules of water and molecules of oil?

Answer 1

Most oils are non-polar, so usually, the primary intermolecular force between their molecules are London dispersion forces, caused by the random motion of electrons forming temporary dipole moments across the length of the molecule.

Answer 2

In water, which is composed of hydrogen and oxygen there is a large difference in electronegativity, meaning that the oxygen has a stronger pull on electrons. This, combined with the bent shape of a water molecule, results in a polar substance, with the oxygen end having a partial negative charge and the hydrogen end having a partial positive charge. As a result, water molecules are attracted to one another in much the same manner as magnets with the positive end of one molecule attracted to the negative end of another.

By contrast oils, which are usually composed of hydrocarbons or lipids, have mostly carbon-hydrogen bonds. There is only a fairly small difference in electronegativity between carbon and hydrogen. This results in a less polar bond. Also, these bonds are in a rather symmetrical arrangement, so what little polarity there is cancels itself out. As a result, oils do not experience the same polar attraction that water does.

Answer 3

The force between water and oil molecules is primarily an intermolecular force called London dispersion forces. Water molecules are polar and are attracted to other polar molecules, while oil molecules are nonpolar and are attracted to other nonpolar molecules. However, water and oil do not mix well due to their different polarities, resulting in immiscibility.

Answer 4

The oil and the water both has a negative charge so they will repel each other. Also the density of the water is larger than the oil so the water will sink and the oil will rise.

Answer 5

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