Washing and Extracting Various Things

getting back to extractions, there are really only four classes of compounds that are commonly handled in undergraduate extractions or washings. 

Strong Acids. The mineral acids, and organic acids (e.g., benzoic acid). You usually extract these into sodium bicarbonate solution or wash them with it. 

Really weak acids. Usually phenols, or substituted phenols. Here, you d use a sodium hydroxide solution for washing or extraction. You need a strong base to work with these weak acids. 

Organic bases. Any organic amine (aniline, triethylamine, etc.). As you use bases to work with acids, use a dilute acid (5 to 10% HC1, say) to extract or wash these bases. 

Neutral compounds. All else, by these definitions (e.g., amides, ethers, alcohols, hydrocarbons). 

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Washing and Extracting Various Things How To Extract and Wash What... 

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