Chemistry chemical tests

    Cards (37)

    • What sound does hydrogen make when tested?
      'Squeaky pop' sound
    • How is hydrogen tested in a laboratory?
      Using a burning splint in the gas
    • What happens to a glowing splint in oxygen?
      It relights
    • How is oxygen tested in a laboratory?
      By inserting a glowing splint into the gas
    • What indicates the presence of carbon dioxide in limewater?
      It turns cloudy
    • How is carbon dioxide tested in a laboratory?
      By bubbling the gas through limewater
    • What color does damp red litmus paper turn in ammonia?
      Blue
    • How is ammonia tested in a laboratory?
      Using damp red litmus paper
    • What forms when ammonia reacts with hydrogen chloride gas?
      White smoke of ammonium chloride
    • How is chlorine tested in a laboratory?
      By using damp litmus paper
    • What happens to damp litmus paper in chlorine gas?
      It bleaches and turns white
    • What color flame does lithium produce in a flame test?
      Red
    • What color flame does sodium produce in a flame test?
      Yellow
    • What color flame does potassium produce in a flame test?
      Lilac
    • What color flame does calcium produce in a flame test?
      Orange-red
    • What color flame does copper produce in a flame test?
      Blue-green
    • How is ammonium ion (NH4+) tested using NaOH(aq)?
      It forms NH3(g) and turns litmus blue
    • What precipitate does copper(II) produce with NaOH(aq)?
      Blue precipitate
    • What precipitate does iron(II) produce with NaOH(aq)?
      Green precipitate
    • What precipitate does iron(III) produce with NaOH(aq)?
      Brown precipitate
    • How are halide ions tested using silver nitrate solution?
      Add nitric acid, then silver nitrate
    • What precipitate does chloride give with nitric acid and silver nitrate?
      White precipitate
    • What precipitate does bromide give with nitric acid and silver nitrate?
      Cream precipitate
    • What precipitate does iodide give with nitric acid and silver nitrate?
      Yellow precipitate
    • How are sulfate ions tested using barium chloride solution?
      Add hydrochloric acid, then barium chloride
    • What indicates the presence of sulfate ions?
      Add dilute hydrochloric acid and barium chloride and a White precipitate will form
    • How do carbonate ions react with dilute acids?
      They produce carbon dioxide gas
    • How is carbon dioxide identified when carbonate ions react with dilute acids?
      By bubbling through limewater
    • What happens to limewater when carbon dioxide is present?
      It goes cloudy
    • How is the presence of water tested using anhydrous copper(II) sulfate?
      It turns blue when water is present
    • What color is anhydrous copper(II) sulfate?
      White
    • How can the purity of water be tested?
      By evaporating it or measuring boiling point
    • What are the tests for gases and their results?
      • Hydrogen: 'Squeaky pop' sound
      • Oxygen: Glowing splint relights
      • Carbon dioxide: Limewater turns cloudy
      • Ammonia: Damp red litmus turns blue
      • Chlorine: Damp litmus bleaches white
    • What are the flame test colors for cations?
      • Lithium: Red
      • Sodium: Yellow
      • Potassium: Lilac
      • Calcium: Orange-red
      • Copper: Blue-green
    • What are the tests for anions and their results?
      • Chloride: White precipitate with silver nitrate
      • Bromide: Cream precipitate with silver nitrate
      • Iodide: Yellow precipitate with silver nitrate
      • Sulfate: White precipitate with barium chloride
      • Carbonate: Produces CO₂ with dilute acids
    • What are the tests for cations and their results?

      • Ammonium: Turns damp red litmus blue
      • Copper(II): Blue precipitate with NaOH
      • Iron(II): Green precipitate with NaOH
      • Iron(III): Brown precipitate with NaOH
    • How can the presence of water be tested?
      • Using anhydrous copper(II) sulfate: turns blue
      • Evaporating water or measuring boiling point
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