C3 - Analysing Substances - Anion tests

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1. What colour precipitate would form for Cl,Br and I?

  • Cl-white , Br-cream , I-yellow
  • Cl-white, Br-green, I-brown
  • Cl-yellow, Br-cream, I-white
  • Cl-cream, Br-green, I-white
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2. What would be the result of a sulphate test?

  • Carbon dioxide would be produced (turns limewater cloudy)
  • Yellow Iodine sulphate would form
  • White Barium sulphate precipitate would form
  • Cream Chlorine sulphate would form

3. How would you test for a halide ion?

  • react with Sodium Hydroxide
  • react with silver nitrate (and dilute nitric acid)
  • react with barium chloride (and HCL)
  • flame test

4. How would you test a substance to see if it contains a carbonate ion?

  • Add sodium hydroxide
  • React with dilute acid
  • Flame test
  • Add silver nitrate solution (and dilute nitric acid)

5. What is the test for CO2 ( do test to see if CO2 was produced in the last reaction)

  • Has a distinctive choking smell
  • limewater turns cloudy
  • White precipitate forms when reacted with barium chloride
  • reacts with water to form CaO

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