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6.2 Reversible reactions and dynamic equilibrium

6.2 Reversible reactions and dynamic equilibrium

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Question 3

This question is about sulfur oxides.

Sulfur dioxide gas reacts with oxygen gas to produce sulfur trioxide gas. Sulfur trioxide can be decomposed back into sulfur dioxide and oxygen gas.

a.

Which two words describe the reaction between sulfur dioxide gas and oxygen gas?

  • Oxidation
  • Neutralisation
  • Precipitation
  • Polymerisation
  • Reversible
[2]
b.

The equation for the 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)

Which statement describes this reaction at dynamic equilibrium?

  • The rate of the forward reaction is higher than the rate of the reverse reaction.
  • The rate of the forward reaction is equal to the rate of the reverse reaction.
  • The rate of the forward reaction is lower than the rate of the reverse reaction.
[1]
Markscheme

6.2 Reversible reactions and dynamic equilibrium Questions

  1. GCSE
  2. /Chemistry
  3. /6.2 Reversible reactions and dynamic equilibrium

21 exam-style questions on AQA GCSE Chemistry 6.2 Reversible reactions and dynamic equilibrium, covering 6.2.1 Reversible reactions, 6.2.2 Energy changes and reversible reactions, 6.2.3 Equilibrium, 6.2.4 The effect of changing conditions on equilibrium (HT only), 6.2.5 The effect of changing concentration (HT only), 6.2.6 The effect of temperature changes on equilibrium (HT only), and 6.2.7 The effect of pressure changes on equilibrium (HT only). Each one has a worked solution and a mark scheme showing where the marks go.

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