A highly impure sample of benzoic acid is contaminated with naphthalene. Which of the following techniques would be LEAST effective for purifying the benzoic acid?
Simple distillation
Sublimation followed by recrystallization
Recrystallization from hot water
Treatment with sodium bicarbonate followed by acidification
Related Questions
A mixture of benzoic acid and benzamide is dissolved in diethyl ether. Which of the following would be the MOST efficient method to separate the two compounds?
Fractional distillation
Recrystallization from hot water
Extract the ethereal solution with aqueous sodium bicarbonate, then acidify the aqueous layer to recover benzoic acid; evaporate the ether to recover benzamide.
Steam distillation
