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6.2 Reversible reactions and dynamic equilibrium

6.2 Reversible reactions and dynamic equilibrium

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Question 8

This question is about reversible reactions.

When 5.94 g5.94\text{ g}5.94 g of hydrated nickel(II) chloride changes into anhydrous nickel(II) chloride:

  • 3.24 g3.24\text{ g}3.24 g of anhydrous nickel(II) chloride is produced
  • 2.10 kJ2.10\text{ kJ}2.10 kJ of energy is taken in from the surroundings

The equation for the reversible reaction is:

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

Calculate the maximum mass of water that can be produced from 17.82 g17.82\text{ g}17.82 g of hydrated nickel(II) chloride.

[3]
b.

7.452 g7.452\text{ g}7.452 g of anhydrous nickel(II) chloride completely changes into hydrated nickel(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.

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