In the industrial manufacture of sulfuric acid (reagents of which are used to make phosphate fertilisers), sulfur dioxide gas reacts with oxygen gas in a reversible reaction to produce sulfur trioxide gas.
Write the word equation for this reaction, including the correct symbol to show that the reaction is reversible.
30 exam-style questions on Edexcel GCSE Chemistry 6.3 Dynamic equilibria, covering 6.3.1 The Haber process as a reversible reaction, 6.3.2 Conditions and rate in industrial equilibria, and 6.3.3 Fertilisers and the preparation of ammonium sulfate. Each one has a worked solution and a mark scheme showing where the marks go.