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

3. What do u add to a solution to test for carbonate ions?

  • Silver nitrate
  • Sodium hydroxide
  • Dilute acid
  • Barium nitrate

4. 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 red litmus paper in the test tube and it goes blue
  • 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

5. What do u add to dissolve the bromine preciptate?

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

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