It can be really important to separate out chemicals for all kinds of reasons. Learn about the different methods engineers used to achieve separation in this video. Explore "distillation, which separates substances based on their different boiling points; liquid-liquid extraction, which uses differences in solubility to transfer a contaminant into a solvent; and reverse osmosis, which filters molecules from a solvent by pressurizing it through a semipermeable barrier". [11:15]