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3 marksNon-Metals

CSEC Chemistry · January 2016 · Paper 2 · Question 6(b)

Calcium oxide and concentrated sulfuric acid are common drying agents. Calcium oxide is preferred for drying ammonia gas.

Explain why concentrated sulfuric acid is not used. Include in your answer a balanced chemical equation.

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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(c)(i)What TWO factors should be considered when choosing an appropriate method for the collection of gases in the laboratory?[2 marks]
  3. 6(c)(ii)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…[5 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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