C3 - tests for metal ions Different tests done to discover what ion an unlabelled compound is. 3.5 / 5 based on 3 ratings ? ChemistryTesting and analysing substancesGCSEAll boards Created by: Isla DonohoeCreated on: 22-05-12 15:41 Test for Chloride ions Add 2cm(cubed) dilute nitric acid followed by 2cm(cubed) silver nitrate. If a white precipitate is formed, the compound is a Chloride ion. 1 of 5 Test for Carbonates Add Limewater. If the solution goes cloudy then carbonate ions are present. OR... Add 5cm(cubed) of Hydrochloric acid. If bubbles of gas are given off, then carbonate ions are present. 2 of 5 Test for Nitrates Add a little aluminium powder, a few drops of sodium hydroxide and warm. If ammonia is formed, then the compound is a nitrate. 3 of 5 Test for Copper Add a few drops of Sodium hydroxide to the compound. If a blue precipitate is formed, then the compound is Copper. 4 of 5 Test for Sulfate Add 2cm(cubed) dilute Hydrochloric acid followed by 2cm(cubed) barium chloride. If the compound is a Sulfate, then a white precipitate will form. 5 of 5
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