Two phases form in a separatory funnel in the liquid–liquid form of this technique. For 10 points each:
[10m] Name this process that separates chemicals based on their solubility. Caffeine is purified out of coffee beans using this technique.
ANSWER: extraction [accept liquid–liquid extraction, extracting, or LLE; prompt on leaching]
[10e] The aqueous phase is easy to pour out the bottom of a separatory funnel since water’s value for this quantity, 1 gram per milliliter, is greater than most organic solvents.
ANSWER: mass density [prompt on rho; prompt on D]
[10h] On the other hand, the top phase must be carefully removed using this technique of moving liquid upwards using negative pressure. The two steps of pipetting are this process and expulsion.
ANSWER: aspiration [or aspirating; or aspirate; prompt on reverse pipetting]
<Adam Silverman, Science - Chemistry> ~20993~ <Editor: Adam Silverman>