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Effects of substituents on the acidity of phenols: Existence of electron attracting group, (for example-NO2, -X, - NR, -CN, -CHO, -COOH) on the benzene ring increases the acidity of phenol since it enables the ring to draw much more electrons from the phenoxy oxygen and so releasing easily the proton.
Amines that are insoluble in pure water will be soluble in acid due to the formation of an ammonium chloride salt. 2-Acetyl Chloride Test Alcohol Phenol 1 o amine 2 o amine Procedure In hood: Add drop by drop 0.2 mL of acetyl chloride to 0.2 mL or 0.2 g of the unknown.Allow the mixture to stand for a minute or two and then pour it cautiously into 1 mL of water.olubility in water 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.