C3 - Analysing Substances - Anion tests

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1. What would a carbonate produce when reacted with dilute acid?

  • Water and limestone
  • Carbon dioxide and calcium oxide
  • Water and Carbon dioxide
  • Carbon dioxide and Limestone
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2. What is the test for CO2 ( do test to see if CO2 was produced in the last reaction)

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

3. What would be the result of a sulphate test?

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

4. How would you test for sulphate ions?

  • Flame test
  • Add Barium chloride (in presence of dilute HCL)
  • react with dilute acid
  • Add sodium hydroxide

5. What is the charge of Anions?

  • Negative
  • Positive
  • No charge


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