Skip to content

Course home

6.2 Reversible reactions and dynamic equilibrium

6.2 Reversible reactions and dynamic equilibrium

EasyMedium
1234567891011
Question 1

This question is about reversible reactions.

When 4.76 g of hydrated cobalt(II) chloride changes into anhydrous cobalt(II) chloride:

  • 2.60 g of anhydrous cobalt(II) chloride is produced
  • 1.90 kJ of energy is taken in from the surroundings

The equation for the reversible reaction is:

hydrated cobalt(II) chloride⇌anhydrous cobalt(II) chloride+water \text{hydrated cobalt(II) chloride} \rightleftharpoons \text{anhydrous cobalt(II) chloride} + \text{water} hydrated cobalt(II) chloride⇌anhydrous cobalt(II) chloride+water
a.

Calculate the maximum mass of water that can be produced from 14.28 g of hydrated cobalt(II) chloride.

[3]
b.

8.45 g of anhydrous cobalt(II) chloride completely changes into hydrated cobalt(II) chloride when water is added. Calculate the amount of energy transferred to the surroundings. Give your answer to 3 significant figures.

[3]
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.

Question bank