Halide Ions

• Testing for Halide Ions

  1. Acidify solution with dilute nitric acid
  2. Add silver nitrate
• Chloride ions form a white precipitate that is soluble in dilute nitric acid
• Bromide ions form a cream precipitate which is soluble in concentrated nitric acid
• Iodide ions form a yellow precipitate that is insoluble in concentrated nitric acid
• Adding dilute nitric acid causes carbonate ions to react, removing any incorrect positive results