Question
Before doing a liquid-liquid extraction, one should verify the values of this property for the employed solvents. For 10 points each:
[10e] Name this property of the aqueous and organic layers that determines which layer sits on top. For water, this quantity is 1 gram per milliliter.
ANSWER: density [or mass density]
[10h] Unlike most organic solvents like hexanes or ethyl acetate, this dense solvent sits below the aqueous layer during an extraction. This solvent is often used to decaffeinate coffee and was once common in paint removers, but the EPA banned its use in 2019.
ANSWER: dichloromethane [or DCM or methylene chloride or CH2Cl2]
[10m] This quantity gives the relative amount of a molecule extracted into the organic layer. A molecule’s lipophilicity is often measured by its value of this quantity for the octanol-water system.
ANSWER: partition coefficient [or distribution coefficient; prompt on D or P or K]
<JZ, Chemistry>
Summary
| 2024 ARCADIA at Claremont | 2024-11-02 | Y | 3 | 6.67 | 67% | 0% | 0% |
Data
| Anderson et al. | ALCU | 10 | 0 | 0 | 10 |
| Claremont | U[C]SD | 10 | 0 | 0 | 10 |
| SGV Ventures | Jason et al. | 0 | 0 | 0 | 0 |