A sealed reactor contains an equilibrium mixture for the reversible reaction:
2P(g)+Q(s)⇌R(g)+S(g) \mathrm{2P(g) + Q(s) \rightleftharpoons R(g) + S(g)} 2P(g)+Q(s)⇌R(g)+S(g)Some S(g)\mathrm{S(g)}S(g) is removed and the pressure is increased. The reactor is sealed again and allowed to reach a new equilibrium.
Explain how the two changes affect the position of equilibrium and the amount of R(g)\mathrm{R(g)}R(g) when the new equilibrium is reached.
124 exam-style questions on OCR GCSE Chemistry 5.3 Equilibria, covering 5.3.1 Reversible reactions and dynamic equilibrium and 5.3.2 Changing the position of equilibrium. Each one has a worked solution and a mark scheme showing where the marks go.