Testing for ions

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1. What are the observations for the sulphate reaction?

  • Dissovles
  • Barium sulphate precipitate in a blue solution
  • Barium sulphate precipitate in a colourless solution
  • Fizzes as co2 gas given off
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2. What are the observations After adding silver nitrate to a solution containing halide ions?

  • Iodine- White precipitate chlorine- yellow preciptate bromine- cream
  • Iodine - yellow precipitate chloride- White precipitate bromine- cream precipitate
  • All white preciptate
  • All yellow precipitate

3. What do u add to dissolve the chloride precipitate ?

  • Excess silver nitrate
  • Concentrated ammonia
  • Dilute ammonia
  • Barium nitrate

4. What are the obersavations of the testing for chloride reaction and why does this happen?

  • Dissolves
  • Fizzes because oxygen is given off
  • Fizzes because co2 gas is given off
  • Catches fire

5. What is the first thing you add to test for a halide ion ?

  • Add concentrated ammonia
  • Add silver nitrate
  • Add sodium hyroxide
  • Add chlorine

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