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6.2 Reversible reactions and dynamic equilibrium

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Question 19
H

The FeSCN2+\text{FeSCN}^{2+}FeSCN2+ ion is deep red. A few drops of a solution containing Fe3+\text{Fe}^{3+}Fe3+ ions are added to the equilibrium mixture.

Fe3+(aq)+SCN−(aq)⇌FeSCN2+(aq)\text{Fe}^{3+}\text{(aq)} + \text{SCN}^-\text{(aq)} \rightleftharpoons \text{FeSCN}^{2+}\text{(aq)}Fe3+(aq)+SCN−(aq)⇌FeSCN2+(aq)

What is seen, and why?

[1]
A

The colour fades, because the position of equilibrium shifts left

B

The colour deepens, because the position of equilibrium shifts left

C

The colour fades, because the position of equilibrium shifts right

D

The colour deepens, because the position of equilibrium shifts right

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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