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6.2 Reversible reactions and dynamic equilibrium

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Question 27
H

A pink solution containing cobalt(II) ions is warmed and turns blue. The equilibrium in the solution is shown.

pink complex + 4Cl−4\text{Cl}^-4Cl− ⇌ \rightleftharpoons\,⇌ blue complex + 6H2O6\text{H}_2\text{O}6H2​O

What does the colour change show about the forward reaction?

[1]
A

It is exothermic, because heating supplies energy to the mixture

B

It is exothermic, because the products are favoured by heating

C

It is endothermic, because heating shifts the equilibrium right

D

It is endothermic, because heating shifts the equilibrium left

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6.2 Reversible reactions and dynamic equilibrium Questions

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

109 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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