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Question
Give a balanced equation for the manufacture of sulphuric acid by the contact process.
Chemical Equations/Structures
Very Short Answer
Solution
Contact process: Sulphur or Pyrite Burner
\[\ce{S + O2 -> SO2}\]
\[\ce{4FeS2 + 11O2 -> 2Fe2O3 + 8SO2\uparrow}\]
Contact Tower:
\[\ce{2SO2 + O2 <=>[450^\circ C][V2O5/K2O] 2SO3\uparrow}\]
Absorption Tower:
\[\ce{SO3 + H2SO4 -> \underset{Oleum}{H2S2O7}}\]
Dilution Tank:
\[\ce{H2S2O7 + H2O -> 2H2SO4}\]
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