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6.2 Reversible reactions and dynamic equilibrium

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Question 6
F

Calcium carbonate is heated in a sealed container, as shown by the equation.

CaCO3⇌CaO+CO2\text{CaCO}_3 \rightleftharpoons \text{CaO} + \text{CO}_2CaCO3​⇌CaO+CO2​

Which condition is needed for the mixture to reach equilibrium?

[1]
A

The carbon dioxide must be allowed to escape slowly

B

None of the substances must be able to leave the container

C

All of the calcium carbonate must decompose first

D

The container must be opened once the reaction has started

Markscheme

6.2 Reversible reactions and dynamic equilibrium Questions

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

40 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, 6.2.5 The effect of changing concentration, 6.2.6 The effect of temperature changes on equilibrium, and 6.2.7 The effect of pressure changes on equilibrium. Each one has a worked solution and a mark scheme showing where the marks go.

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