Question

1. How might your results be affected if you neglected to triturate the solid prior to recrystallization?

A. The product would not dissolve in the ethanol during recrystallization

B. Little or no product would be formed

C. The recrystallized product will likely contain some impurities leading to misidentification of the product

D. The only effect this might have is the formation of larger crystals during recrystallization

2. In the Wittig reaction, the nucleophile is

A. a phosphorus ylide

B. an enolate ion

C. the phase transfer catalyst

D. the carboxylic acid

3. What is the function of the dichloromethane used during the separation step?

A. It reacts with the benzyltriphenylphosponium chloride to form the butadiene product

B. Dichloromethane removes water from the reaction mixture

C. Dichloromethane is used as the phase transfer catalyst

D. It acts as the solvent for the desired product to separate it from the water soluble substances in the solution mixture

4. If you are uncertain which layer removed from a separatory funnel is which in terms of aqueous versus organic, how could you make that determination?

A. Weigh both layers and the heaviest was the bottom layer

B. Mix a small amount of water with a small sample of each layer and the one it dissolves in is the aqueous layer

C. The darkest colored layer is probably the organic layer

D. Heat the liquid from each layer and the one with the lowest boiling point is the organic layer

5. During the separation phase of the experiment, the diene product is being extracted from which layer?

A. acidic

B. Non-polar

C. Organic

D. Aqueous

6. What would be the volume of 92.1 mmol of trans-cinnamaldehyde? volume in mL