SACE Stage 2 Chemistry Practice Questions - SACE Stage 2 Chemistry External Assessment Exam

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Sulfur dioxide emissions contribute significantly to acid rain. Which balanced atmospheric equation correctly represents the oxidation of sulfur dioxide followed by its reaction with water to form sulfuric acid?

2SO2(g) + O2(g) -> 2SO3(g); SO3(g) + H2O(l) -> H2SO4(aq) SO2(g) + H2O(l) -> H2SO3(aq); 2H2SO3(aq) + O2(g) -> 2H2SO4(aq) SO2(g) + O2(g) -> SO4(g); SO4(g) + H2O(l) -> H2SO4(aq) 2SO2(g) + 2H2O(l) + O2(g) -> 2H2SO3(aq) + O2(g)

Correct Answer:

2SO2(g) + O2(g) -> 2SO3(g); SO3(g) + H2O(l) -> H2SO4(aq)

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