Distillation is a process that can be used toseparate a pure liquid from a mixture of liquids. It works when the liquids have different boiling points.Distillation is commonly used to separate ethanol - the alcohol in alcoholic drinks - from water. The mixture is heated in a flask.
Distilled water is water that has been boiled to become steam and then cooled to become wateragain. It's then free of minerals and salts