Test for Negative Ions

To test for Carbonate Ions:

Add: Dilute Hydrochloric Acid

If carbonate ions are present: If it fizzes and there is gas produced, bubble it through water and it turns the limewater milky.

To test for Halide (Chloride, Bromide or Iodide) Ions: 

Add: Dilute Nitric Acid & Silver Nitrate Solution

( Precipitation reactions…