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6.2 Reversible reactions and dynamic equilibrium

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Question 25

A sealed storage box contains a small transparent packet of white anhydrous copper(II) sulfate so that the box can be checked for damp. After several weeks, the copper(II) sulfate in the packet has turned blue.

A student then adds a few drops of water to some fresh white anhydrous copper(II) sulfate in a test tube. The solid turns blue and the temperature of the test tube rises from 20 °C to 27 °C.

a.

Explain what these observations show.

[3]
b.

The blue copper(II) sulfate from the packet is heated. Explain the changes in colour and energy transfer.

[3]
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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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