Testing for ions

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1. How can you tell if you have a ammonium ion in the solution?

  • A recently lit splint will re light when held in the test tube
  • Hold damp red litmus paper in test tube and it turns blue
  • Hold blue red litmus paper in the test tube and it goes red
  • Hold red litmus paper in the test tube and it goes blue
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2. What are the observations for the sulphate reaction?

  • Fizzes as co2 gas given off
  • Barium sulphate precipitate in a colourless solution
  • Barium sulphate precipitate in a blue solution
  • Dissovles

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

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

4. What do you add to a solution to test for sulphate ions?

  • Silver sulphate
  • Barium nitrate
  • Barium sulphate
  • Silver nitrate

5. What are the observations After adding silver nitrate to a solution containing halide ions?

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