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6.2 Reversible reactions and dynamic equilibrium

6.2 Reversible reactions and dynamic equilibrium

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Question 7

This question is about copper(II) sulfate.

Blue hydrated copper(II) sulfate turns white when it is heated. The word equation for the reaction is:

hydrated copper(II) sulfate (blue)⇌anhydrous copper(II) sulfate (white)+water \text{hydrated copper(II) sulfate (blue)} \rightleftharpoons \text{anhydrous copper(II) sulfate (white)} + \text{water} hydrated copper(II) sulfate (blue)⇌anhydrous copper(II) sulfate (white)+water
a.

What does the symbol ⇌\rightleftharpoons⇌ mean?

[1]
b.

A student heats 7.50 g7.50\text{ g}7.50 g of hydrated copper(II) sulfate in a crucible. 2.70 g2.70\text{ g}2.70 g of water is given off as steam. The remaining solid is anhydrous copper(II) sulfate.

Calculate the mass of anhydrous copper(II) sulfate produced.

[2]
c.

A student heats 7.50 g7.50\text{ g}7.50 g of hydrated copper(II) sulfate in a crucible. 2.70 g2.70\text{ g}2.70 g of water is given off as steam. The remaining solid is anhydrous copper(II) sulfate.

Calculate the percentage of water contained in the 7.50 g7.50\text{ g}7.50 g of hydrated copper(II) sulfate.

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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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