In the industrial manufacturing of sulfuric acid, sulfur dioxide gas (SO2\text{SO}_2SO2) is reacted with oxygen gas (O2\text{O}_2O2) to produce sulfur trioxide (SO3\text{SO}_3SO3) in the presence of a catalyst.
The chemical equation for this reaction is:
2SO2(g)+O2(g)⇌2SO3(g) 2\text{SO}_2(\text{g}) + \text{O}_2(\text{g}) \rightleftharpoons 2\text{SO}_3(\text{g}) 2SO2(g)+O2(g)⇌2SO3(g)State the meaning of the ⇌ \rightleftharpoons\,⇌ symbol in this equation.
Practise Edexcel GCSE Chemistry Reversible reactions and equilibria with exam-style questions for Foundation and Higher tier. 38 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.
