Alcohol and carboxylic acid.

Asked by  | 19th Mar, 2008, 03:01: PM

Expert Answer:

Place 2 mL of Lucas reagent in a small test tube and add three to four drops of the alcohol. Stopper the test tube and shake it vigorously. Tertiary, benzylic, and allylic alcohols give an immediate cloudiness as the insoluble alkyl halide separates from the aqueous solution. After a short time, the immiscible alkyl halide will form a separate layer. Secondary alcohols produce cloudiness after two to five minutes. Some secondary alcohols may have to be heated slightly to make the reaction proceed. Primary alcohols dissolve in the reagent to give a clear solution.

Solubility in NaOH: Solubility in 6M NaOH is a positive identification test for acids. A carboxylic acid that is insoluble in pure water will be soluble in base due to the formation of the sodium salt of the acid as the acid is neutralized by the base.

 

Answered by  | 29th May, 2008, 10:02: AM

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