<P> A separatory funnel, also known as separation funnel, separating funnel, or colloquially sep funnel, is a piece of laboratory glassware used in liquid - liquid extractions to separate (partition) the components of a mixture into two immiscible solvent phases of different densities . Typically, one of the phases will be aqueous, and the other a lipophilic organic solvent such as ether, MTBE, dichloromethane, chloroform, or ethyl acetate . All of these solvents form a clear delineation between the two liquids . The more dense liquid, typically the aqueous phase unless the organic phase is halogenated, sinks and can be drained out through a valve away from the less dense liquid, which remains in the separatory funnel . </P> <P> A separating funnel takes the shape of a cone with a hemispherical end . It has a stopper at the top and stopcock (tap), at the bottom . Separating funnels used in laboratories are typically made from borosilicate glass and their stopcocks are made from glass or PTFE . Typical sizes are between 30 mL and 3 L. In industrial chemistry they can be much bigger and for much larger volumes centrifuges are used . The sloping sides are designed to facilitate the identification of the layers . The stopcock - controlled outlet is designed to drain the liquid out of the funnel . On top of the funnel there is a standard taper joint which fits with a ground glass or Teflon stopper . </P>

What is the difference between organic and aqueous layers
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