The isolated organic layer will be contaminated by water. How would you get rid of excess water?

The boiling point of a compound, determined by distillation, is one of the physical properties that can be used to confirm its identity.

How does methanol-water temperature plot differ from the glycerol-water temperature vs volume plot that you observed during your experiment?  

what is the organic solvent used in your extraction of caffeine ?

You have the choice between two organic solvents, one low boiling point and one with a high boiling point. Which one will be your choice?

In the labster experiment you have performed, what is the name of the chemical that moves from the aqueous layer into the organic layer?

When a solid reaches the temperatures of its ___, it can become a liquid.

Why did you scratch the sides of the flask with a glass rod?

Two compounds are being distilled. What is the boiling point of the compound collected first?  

The arrow leading from the highlighted red box identifies which structure: