Reversible reactions and equilibrium

3 lessons in The rate and extent of chemical change.

16 exam questions · 30 marks

6.5 Reversible reactions What reversible reactions are and the ⇌ symbol, how changing conditions changes the direction of a reaction (ammonium chloride, hydrated copper sulfate), and why the energy transferred is the same in each direction but exothermic one way and endothermic the other. AQA Edexcel OCR 5 questions 6.6 Dynamic equilibrium What dynamic equilibrium is: in a closed system, the forward and reverse reactions keep happening at the same rate, so the amounts of reactants and products stay constant, though not equal. AQA Edexcel OCR 5 questions 6.7 Changing conditions: Le Chatelier's principle Le Chatelier's principle: how changing concentration, temperature and pressure moves the position of equilibrium, how to predict the effect on the yield, why a catalyst does not change the position, and the Haber process as an example. Higher only AQA Edexcel OCR 6 questions