Tests for anions

• How to test for carbonate anions, CO3 2-


  by reaction with dilute acid and then testing for carbon dioxide gas

  
• How to test for chloride Cl-, bromide Br-, and iodide I-, anions


  by acidifying with dilute nitric acid then adding aqueous silver nitrate

  
• How to test for nitrate NO3 -, anions


  by reduction with aluminium foil and aqueous sodium hydroxide and then testing for ammonia gas

  
• how to test for sulfate SO4 2-, anions


  by acidifying with dilute nitric acid and then adding aqueous barium nitrate

  
• How to test for sulfite SO3 2-, anions


  by reaction with acidified aqueous potassium manganate(VII)