Why is venting necessary? OGMU 2020
O 1. It introduces more air from outside, helping the separation of polar compounds into the aqueous phase.
2. It increases the concentration of the organic phase relative to the aqueous phase, helping material transition into the aqueous phase.
3. It increases the speed at which separation occurs without the complication of emulsions.
4. It is a safety precaution so that the stopper doesn't pop out of the neck of the funnel.