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Narrative
Aqueous ferric chloride is added to solutions of cyclohexanol, phenol, aspirin, and salicylic acid respectively. Phenolic compounds produce a purple iron complex.

Discussion
Four test tubes contain aqueous ethanolic solutions of cyclohexanol, phenol, acetyl salicylic acid (aspirin), and salicylic acid respectively. Aqueous ferric chloride is added to each tube. The compounds containing phenolic groups - phenol and salicylic acid - produce a purple iron complex.