affected by the pH and Tollens’ reagent to Students carry out a range of ligand. distinguish between different calculations involving aldehydes and ketones. redox titrations. The reduction of silver(I) in Tollens’ reagent to Perform titrations and Practical activities: test for aldehydes associated calculations for Reduction of vanadium(V) to reactions of MnO4– vanadium(II) by zinc, and its Redox titrations, with Fe2+ and C2O42– in subsequent oxidation using including calculations, acidic solution. manganate(VII) of MnO4– with Fe2+ and C2O42– in acidic Various redox titrations eg the solution. percentage iron in ion tablets, the Mr of ethanedioic acid, the Mr of an unknown hydrated iron(II) salt. 3.2.5.6 0.6 Describe what a Students revise how catalysts January 2013 Knockhardy powerpoint: Catalysts. weeks heterogeneous catalyst is increase reaction rate. Unit 5 Q6 and the role of active sites Understand what and the support medium. Students research the use of January 2012 heterogeneous transition metals as catalysts and Unit 5 Q6 catalysts are and how Explain, with the aid of compare homogeneous and they work, including equations, how V2O5, acts heterogeneous catalysis. January 2011 examples and how they as a catalyst in the Contact Unit 5 Q4 can become poisoned. Process. Practical activities: Using a colorimeter to investigate January 2010 Understand what Describe the use of Fe in autocatalysis in which Mn2+ Unit 5 Q1 homogeneous catalysts the process. catalyses the reaction between are, with specific C2O42– and MnO4– June 2006 examples. Explain how heterogeneous Unit 5 Q9 catalysts can become poisoned. June 2013
affected by the pH and ligand. The reduction of silver(I) in Tollens’ reagent to test for aldehydes Redox titrations, including calculations, of MnO4– with Fe2+ and C2O42– in acidic solution. Tollens’ reagent to distinguish between aldehydes and ketones. Perform titrations and associated calculations for reactions of MnO4– with Fe2+ and C2O42– in acidic solution. Students carry out a range of different calculations involving redox titrations. Practical activities: Reduction of vanadium(V) to vanadium(II) by zinc, and its subsequent oxidation using manganate(VII) Various redox titrations eg the percentage iron in ion tablets, the Mr of ethanedioic acid, the Mr of an unknown hydrated iron(II) salt. 3.2.5.6 Catalysts. Understand what heterogeneous catalysts are and how they work, including examples and how they can become poisoned. Understand what homogeneous catalysts are, with specific examples. 0.6 weeks Describe what a heterogeneous catalyst is and the role of active sites and the support medium. Explain, with the aid of equations, how V2O5, acts as a catalyst in the Contact Process. Describe the use of Fe in the process. Explain how heterogeneous catalysts can become poisoned. Students revise how catalysts increase reaction rate. Students research the use of transition metals as catalysts and compare homogeneous and heterogeneous catalysis. Practical activities: Using a colorimeter to investigate autocatalysis in which Mn2+ catalyses the reaction between C2O42– and MnO4– January 2013 Unit 5 Q6 January 2012 Unit 5 Q6 January 2011 Unit 5 Q4 January 2010 Unit 5 Q1 June 2006 Unit 5 Q9 June 2013 Knockhardy powerpoint: