Sulfur dioxide reacts with oxygen to form sulfur trioxide.
The reaction is reversible.
Complete the word equation for this reaction by adding the symbol to show that it is a reversible reaction.
sulfur dioxide + oxygen ..... sulfur trioxide
38 exam-style questions on Edexcel GCSE Chemistry 5.2 Reversible reactions and equilibria, covering 5.2.1 Reversible reactions and dynamic equilibrium, 5.2.2 The Haber process, and 5.2.3 Changing the position of a dynamic equilibrium. Each one has a worked solution and a mark scheme showing where the marks go.