How To Prepare Tollen’s Reagent

Tollen’s Reagent

Purpose: Detects aldehydes (reducing agents).

Procedure:

1. Prepare fresh before use:

   • Mix 2 ml of 0.1 M silver nitrate solution.

   • Add a few drops of dilute NaOH to form Ag₂O precipitate.

   • Add dilute ammonia dropwise until the precipitate just dissolves.