Chemistry tests to know 5.0 / 5 based on 1 rating ? ChemistryPractical TechniquesA2/A-levelAQA Created by: cosminliveCreated on: 24-04-18 16:34 How to test for ammonium ions? Add NaOH and gently heat. Hold your litmus paper over, and it should turn from red to blue 1 of 13 carbonate ions Add HCl, then limewater. CO2 will be produced, limewater turns cloudy 2 of 13 sulfate ions HCl + Barium Chloride. White precipitate of Barium Sulfate is produced 3 of 13 Testing for Halides Add nitric acid + silver nitrate. You will produce a white, or creamy or yellow precipitate 4 of 13 Further Tests for halides Dilute Ammonia, Conc Ammonia, Conc Ammonia - Dissolves, Dossolves, No change 5 of 13 Solid Chloride Conc H2SO4 - steamy fumes of HCl 6 of 13 Solid Bromide Conc H2SO4 - production of steamy fumes of HBr and brown Br2 7 of 13 Solid Iodide Conc H2SO4 - production of steamy fumes of HI, H2S (rotten egg smell) 8 of 13 Testing for an Alkene Bromine Water (turns colourless) 9 of 13 Testing for an Aldehyde Fehling's Solution ( Blue to red precipitate) or Tollen's (silver mirror formed) 10 of 13 Carboxylic Acid Sodium Hydrogen Carbonat (CO2 Produced) 11 of 13 1,2 Alcohol and aldehyde Sodium dichromate and sulfiric acid (Orange to Green colour) 12 of 13 Acyl Chloride Silver Chloride (Steamy fumes of HCl, production of white precipitate) 13 of 13
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