How complexes can June 2003 show cis-trans (E–Z) or Know the complexes in Unit 5 Q3 optical isomerism. cisplatin and Tollens’ reagent. 3.2.5.4 0.6 Explain why transition metal Explain using diagrams and the June 2013 Colorimetry:: Formation of coloured weeks complexes are coloured. equation = hν (= hc/λ) why Unit 5 Q6 ∆E ions transition metal complexes are Chemguide Describe factors that affect coloured and what factors affect the January 2013 Understand why the colour of transition colour. Unit 5 Q8 transition metal ions are metal ions. coloured and what Use a graph of absorption versus June 2011 affects the colour. Describe how colorimetry concentration to determine the Unit 5 Q7 can be used to find the concentration of the solution. Use colorimetry to concentration of coloured June 2010 measure concentration ions in solution. Practical activity: Unit 5 Q4 of solutions. Using a colorimeter to determine the concentration of copper(II) ions in a solution. 3.2.5.5 1.2 Describe and explain what Students predict what reducing January 2012 Video of vanadium(V) reduction: Variable oxidation weeks happens when vanadate(V) agent will reduce vanadium(V) to Unit 5 Q7 states. ions are reduced by zinc in vanadium(II) using EƟ values. acidic solution. June 2012 Know what happens Students compare redox potentials Unit 5 Q6 when vanadate(V) is Understand how the redox for Cr3+ and Fe3+ at different pH reduced by zinc in potential of a transition values and different ligands. June 2003 acidic solution. metal ion is affected by Unit 5 Q2 changes in pH and ligand. Students revise the use of Tollens’ How the potential reagent to test for aldehydes. for a transition metal is Describe and explain the use of Ag(NH3)2+ in
How complexes can show cis-trans (E–Z) or optical isomerism. Know the complexes in cisplatin and Tollens’ reagent. June 2003 Unit 5 Q3 3.2.5.4 Formation of coloured ions Understand why transition metal ions are coloured and what affects the colour. Use colorimetry to measure concentration of solutions. 0.6 weeks Explain why transition metal complexes are coloured. Describe factors that affect the colour of transition metal ions. Describe how colorimetry can be used to find the concentration of coloured ions in solution. Explain using diagrams and the equation ∆E = hν (= hc/λ) why transition metal complexes are coloured and what factors affect the colour. Use a graph of absorption versus concentration to determine the concentration of the solution. Practical activity: Using a colorimeter to determine the concentration of copper(II) ions in a solution. June 2013 Unit 5 Q6 January 2013 Unit 5 Q8 June 2011 Unit 5 Q7 June 2010 Unit 5 Q4 Colorimetry:: Chemguide 3.2.5.5 Variable oxidation states. Know what happens when vanadate(V) is reduced by zinc in acidic solution. How the potential for a transition metal is 1.2 weeks Describe and explain what happens when vanadate(V) ions are reduced by zinc in acidic solution. Understand how the redox potential of a transition metal ion is affected by changes in pH and ligand. Describe and explain the use of Ag(NH3)2+ in Students predict what reducing agent will reduce vanadium(V) to vanadium(II) using EƟ values. Students compare redox potentials for Cr3+ and Fe3+ at different pH values and different ligands. Students revise the use of Tollens’ reagent to test for aldehydes. January 2012 Unit 5 Q7 June 2012 Unit 5 Q6 June 2003 Unit 5 Q2 Video of vanadium(V) reduction:
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