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The diagram below shows the set up used by a student to prepare dry sulphur IV oxide gas. Study it carefully and answer the question that follows.
set up used by a student to prepare dry Sulphur IV Oxide gas

  1. Complete the diagram to show how to collect dry sulphur (IV) oxide. 
  2. Write an equation for the reaction in the flask. 
  3. Give another pair of chemical that could be used to prepare sulphur (IV) oxide. 
  4. Sulphur IV oxide gas was bubbled through concentrated nitric (V) acid. State and explain the observations made.

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  1. complete diagram of how Sulphur IV Oxide is collected
  2. Na2SO3(s) + 2HCl(aq) → 2NaCl(aq) + H2O(l) + SO2(g) 
  3. Copper ✓1 and Conc. Sulphuric acid 
  4. Brown fumes of NO2 are produced. SO2 reduces conc. HNO3 forming brown fumes of NO2.
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