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5 marksNon-Metals

CSEC Chemistry · January 2016 · Paper 2 · Question 6(c)(ii)

Gases can be collected by upward delivery, downward delivery, or displacement of water.

Identify ONE of the three methods that is best suited for the collection of ammonia gas in the laboratory. Explain why EACH of the other two methods would NOT have been appropriate.

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Other parts of this question

  1. 6(a)Identify TWO reagents that are necessary for the laboratory production of ammonia.[1 mark]
  2. 6(b)Explain why concentrated sulfuric acid is not used. Include in your answer a balanced chemical equation.[3 marks]
  3. 6(c)(i)What TWO factors should be considered when choosing an appropriate method for the collection of gases in the laboratory?[2 marks]
  4. 6(d)Hence, draw a labelled diagram of the apparatus which could be used for the preparation of dry ammonia in the laboratory. Be sure to identify in your diagram…[4 marks]

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