catalyse the reactions of Recognise that catalysts are A catalyst is a substance that increases the the decomposition of specific to particular reactions rate of a chemical reaction without being hydrogen peroxide and Describe the effect of different changed in chemical composition or amount. the reaction between catalysts on the rate of reaction Catalysts work by providing an alternative sodium thiosulfate and reaction of lower activation energy. iron (III) nitrate. 10 Catalysts and reaction 8.8 Students should be able to use a rate distribution to help explain how a Recognise that some catalysts catalyst increases the rate of a reaction Introduce the idea that actually take part in a chemical involving a gas. some catalysts do take reaction to form an intermediate part in a reactions and step investigate an example Make careful observations from with the reaction investigations between potassium use a Maxwell–Boltzmann sodium tartrate and distribution to help explain how a hydrogen peroxide with catalyst increases the rate of a cobalt (II) chloride as a reaction involving a gas catalyst. Relate catalysis to the Maxwell distribution. Student Required One hour lessons Learning Outcomes Specification Content Skills Covered Book Section Practicals CHAPTER 9 Equilibria (7 hours) – 1 Dynamic Equilibrium 9.1 3.1.6.1 Chemical equilibria and Le Chatelier’s Give examples of different reversible changes principle Recap ideas about Explain how reversible reactions and dynamic reversible reactions. Use In a reversible reaction at equilibrium are linked the effect of heat on equilibrium: forward and Apply ideas of dynamic equilibrium to practical iodine crystals, the reverse reactions proceed investigations dissociation of
catalyse the reactions of the decomposition of hydrogen peroxide and the reaction between sodium thiosulfate and iron (III) nitrate. Recognise that catalysts are specific to particular reactions Describe the effect of different catalysts on the rate of reaction A catalyst is a substance that increases the rate of a chemical reaction without being changed in chemical composition or amount. Catalysts work by providing an alternative reaction of lower activation energy. Students should be able to use a distribution to help explain how a catalyst increases the rate of a reaction involving a gas. 10 Catalysts and reaction rate Introduce the idea that some catalysts do take part in a reactions and investigate an example with the reaction between potassium sodium tartrate and hydrogen peroxide with cobalt (II) chloride as a catalyst. Relate catalysis to the Maxwell distribution. Recognise that some catalysts actually take part in a chemical reaction to form an intermediate step Make careful observations from investigations use a Maxwell–Boltzmann distribution to help explain how a catalyst increases the rate of a reaction involving a gas 8.8 One hour lessons Learning Outcomes Specification Content Skills Covered Student Book Section Required Practicals CHAPTER 9 – Equilibria (7 hours) 1 Dynamic Equilibrium Recap ideas about reversible reactions. Use the effect of heat on iodine crystals, the dissociation of Give examples of different reversible changes Explain how reversible reactions and dynamic equilibrium are linked Apply ideas of dynamic equilibrium to practical investigations 3.1.6.1 Chemical equilibria and Le Chatelier’s principle In a reversible reaction at equilibrium: forward and reverse reactions proceed 9.1
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