Question

In a chemically active extraction, a three-component mixture of acetylsalicylic acid, acetaminophen, and caffeine in ethyl acetate solution is separated into its individual components first by extraction with a pH 8 buffer solution, then a subsequent extraction with dilute potassium hydroxide solution. Match the statement to the component in the mixture. Not all statements will be used.

Components:
acetylsalicylic acid or caffeine or acetaminophen

Statements:

1) this molecule is least acidic
2)this molecule is most acidic
3) this molecule is recovered by rotary evaporation
4) this molecule is extracted from ethyl acetate by 1 M HCl solution
5) this molecule remains in ethyl acetate solution throughout the extractions
6)this molecule is extracted from ethyl acetate by a pH 8 phosphate buffer
7)this molecule is extracted from ethyl acetate by 1 M KOH solution