Testing for ions

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

  • Hold blue red litmus paper in the test tube and it goes red
  • Hold damp red litmus paper in test tube and it turns blue
  • Hold red litmus paper in the test tube and it goes blue
  • A recently lit splint will re light when held in the test tube
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2. What do u add to dissolve the bromine preciptate?

  • Excess barium nitrate
  • Concentrated ammonia
  • Excess silver nitare
  • Dilute ammonia

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

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

4. 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

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

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

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