THINKING CONTEXTUALLY CD(d) the formulae of arenes and their Microscale Chemistry: The microscale derivatives (aromatic compounds): synthesis of azo dyes (Royal Society (i) the delocalisation of electrons in of Chemistry) compounds In this experiment an azo dye is (ii) how delocalisation accounts for synthesized and used to dye a piece of characteristic properties cotton. Different azo dyes can be synthesized by altering the diazonium salt and the coupling agent. The subtly different colours produced can be linked to changes in delocalization across the dye molecule and the corresponding changes in the energy gap between lower and excited electronic energy levels. THINKING CONTEXTUALLY CD(e) the two common representations The solar spark: Make a Gratzel cell of the benzene molecule and (Royal Society of Chemistry) relation to: A Gratzel cell is a simple form of solar cell (i) the shape of the molecule that can be produced using materials (ii) bonding in the molecule (including a available via The Solar Spark. This treatment of enthalpy change of practical allows learners to produce their hydrogenation) own solar cell made with raspberries! The chemistry behind this activity combines ideas about redox and dyes. It would be suitable as an activity done towards the end of the course. THINKING CONTEXTUALLY
THINKING CONTEXTUALLY CD(d) the formulae of arenes and their derivatives (aromatic compounds): (i) the delocalisation of electrons in compounds (ii) how delocalisation accounts for characteristic properties Microscale Chemistry: The microscale synthesis of azo dyes (Royal Society of Chemistry) In this experiment an azo dye is synthesized and used to dye a piece of cotton. Different azo dyes can be synthesized by altering the diazonium salt and the coupling agent. The subtly different colours produced can be linked to changes in delocalization across the dye molecule and the corresponding changes in the energy gap between lower and excited electronic energy levels. THINKING CONTEXTUALLY CD(e) the two common representations of the benzene molecule and relation to: (i) the shape of the molecule (ii) bonding in the molecule (including a treatment of enthalpy change of hydrogenation) The solar spark: Make a Gratzel cell (Royal Society of Chemistry) A Gratzel cell is a simple form of solar cell that can be produced using materials available via The Solar Spark. This practical allows learners to produce their own solar cell made with raspberries! The chemistry behind this activity combines ideas about redox and dyes. It would be suitable as an activity done towards the end of the course. THINKING CONTEXTUALLY
Chemistry%20B%20Resources%2011-11-16.docx