Like Dissolves Like

By: Sierra Long

Polar liquids dissolve other polar liquids and solids.

The molecules in a polar liquid arrange themselves in such a way so that they are at their lowest possible energy level.

When a non-polar substance is added to the polar liquid, that arrangement is interrupted. The polar liquid will expel the non-polar substance in an attempt to minimize its surface area, so the non-polar substance will be left either floating on top of the water or sinking underneath of the water.

When a polar substance is added to a polar liquid, the positive ions in the liquid will "attack" the negative ions in the substance, and the negative ions in the liquid will "attack" the positive ions in the substance. This will break the substance down into free-floating ions.

Non-polar substance (oil) being added into a polar liquid (water)

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