Test for negative ions key points 2.0 / 5 based on 1 rating ? ChemistryTesting and analysing substancesGCSEAll boards Created by: SamCreated on: 23-03-12 16:44 Carbonates Carbonates - test for CO using limewater - if it turns cloudy CO is present - Copper carbonate turns green - Zinc carbonate turns yellow 1 of 4 Sulfates Sulfates - add dilute HCL - add Barium Chloride - white precipitate of Barium sulfate means the compound was a sulfate 2 of 4 Halides Halides - add dilute nitric acid - add silver nitrate - forms precipiate - Chloride forms a white precipitate - Bromine forms a cream precipiate - Iodide forms a yellow precipitate 3 of 4 Nitrates Nitrates - add Al powder - add NaOH - if the original compound was a nitrate Ammonia is given off as a smelly gas 4 of 4
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