- E1 Elimination: Amberlyst 15 is an _________ polymer and is being used as a ________
- SN1: The reaction you will be performing requires a source of chloride ion, which is the required nucleophile. A sodium chloride solution would be much more safe than a hydrochloric acid solution. Why is acid required?
- Bromination of E-Stilbene: Any excess bromine that persists after the reaction will mosty be left in the ________ and quenched with the ___________ _________ sodium bisulfite .
- SN2: Always add _______ to __________ , and not vice versa.
- Recrystallization and Melting Point: Acetone is a flammable solvent.
- Steam Distillation: Which of the following chemicals involved with this lab can badly stain clothes and skin?
- TLC: If you want to write on the surface of a TLC plate before developing it, you should write using a _________ and use light pressure.
- TLC: In thin-layer chromatography (TLC), the ____________ phase is usually silica gel or alumina, and the __________ phase is usually an organic solvent or mixture of organic solvents.
- Extraction: If a closed container (such as a stoppered separators funnel, or a capped vial) is shaken to mix solvent layers during an extraction, it is important to periodically "vent" the container (e.g. by inverting the separatory funnel and opening the stopcock, or loosening the cap of the vial). This is because:
- Recrystallization and Melting Point: Why should the amount of solvent used in a recrystallization be minimized?
- Simple and Fractional Distillation: Placing a _____________ _____________- between the "pot" and the distillation head increases the number of theoretical plates and thus increases the efficiency of the distillation apparatus.
- Recrystallization and Melting Point: An ideal recrystallization solvent is one in which your compound has _____ solubility in the hot solvent and ______ solubility in the cold solvent.
- TLC: Amberlyst 15 is a polymeric ion-exchange resin that serves as a(n) ______ used to convert chlorophyll to _________ .
- Recrystallization and Melting Point: Heating solvent too quickly and/or without stirring can cause it to boil explosively, or "bump", and violently shoot out of its container.
- TLC: In general, the more polar or hydrogen-bonding a molecule, the higher its Rf on a silica gel TLC plate.
- Simple and Fractional Distillation: Should your distillation set-up be open to air (open system), or closed off to air (closed system)?
- Steam Distillation: In a standard extraction, the separatory funnel should be shaken
- Steam Distillation: When extracting the clove oil, you should shake the separatory funnel
- Extraction: Rank the following compounds in order of the pKa (in water) of their most acidic proton. 1 = lowest pKa, 4 = highest.benzoic acid 1biphenyl 4phenol 2water 3
- Muscles of the neck and shoulder are innervated by spinal nerves from the ________ region.