A reversible reaction that produces a gas is carried out in four different pieces of apparatus. In which apparatus can equilibrium be reached?
An open beaker standing on a heatproof mat
An open flask fitted with a long delivery tube
A crucible that is heated with the lid removed
A sealed flask fitted with a pressure gauge
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.