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New Specifications GCE Chemistry ‘A’ …….Starting Sept 2008

New Specifications GCE Chemistry ‘A’ …….Starting Sept 2008. Specification structure. Units 1 and 4 weighted to allow January entry All theory units available in January and June; Practical in June only. Chemistry A. AS Atoms, Bonds and Groups Chains, Energy and Resources

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New Specifications GCE Chemistry ‘A’ …….Starting Sept 2008

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  1. New SpecificationsGCE Chemistry ‘A’ …….Starting Sept 2008

  2. Specification structure • Units 1 and 4 weighted to allow January entry • All theory units available in January and June; Practical in June only

  3. Chemistry A • AS • Atoms, Bonds and Groups • Chains, Energy and Resources • Practical Skills 1 • A2 • Rings, Polymers and Analysis • Equilibria, Energetics and Elements • Practical Skills 2

  4. Each unit is split up into modules Unit 1 AS • Atoms, Bonds and Groups • Atoms and Reactions • Electrons, Bonding and Structure • The Periodic Table

  5. Atoms and Reactions Atomic structure, the mole and equations Acids, bases and salts, including water of crystallisation Redox reactions Electrons, Bonding and Structure Shells, sub-shells, orbitals All things bonding and all things structure The Periodic Table Periodic trends (at rad, IE, m.pts and b.pts) Group 2 and Group 7 Each module is split up into sections, eg Unit 1 Unit 1 AS

  6. Unit 2 AS • Chains, Energy and Resources • Basic Concepts and Hydrocarbons • Alcohols, Halogenoalkanes and Analysis • Energy • Resources

  7. Basic Concepts and Hydrocarbons Naming, isomerism (structural and E/Z) % yields and atom economy Alkanes, fuels and alkenes Alcohols, Halogenoalkanes and Analysis Alcohols: oxidation, elimination, esterification RX: substitution, environmental problems IR and MS (including fragmentation) Unit 2 AS (1)

  8. Unit 2 AS (2) • Energy • ∆H: combustion, formation, reaction, bond enthalpy • Hess’ law • Rates (qualitative), Boltzmann distribution • Equilibrium (qualitative), le Chatelier • Resources • Greenhouse gases • Ozone: natural formation and radical breakdown • Air pollution and control: catalytic converter • Green chemistry: Main principles only

  9. Unit 1 A2 • Rings, Polymers and Analysis • Rings, Acids and Amines • Polymers and Synthesis • Analysis

  10. Rings, Acids and Amines Polymers and Synthesis Analysis Unit 1 A2

  11. Unit 2 A2 • Equilibria, Energetics and Elements • Rates, Equilibrium and pH • Energy • Transition Elements

  12. Rates, Equilibria and pH Rates (graphical and initial rates), k, RDS Kc Acid-base pairs, weak/strong acids, Ka and buffers pH (strong and weak acids; strong bases and buffers) Energy Born-Haber ∆S ∆GE Fuel cells Transition Elements Ligands, redox, precipitation Stereochemistry and stability constants Unit 2 A2

  13. Assessment

  14. Stretch and Challenge A2 Question Papers only ‘Stretch and challenge’ embedded within papers Less atomistic questions pupils make connections More extended writing Understanding and connectivity assessed through synoptic questions New A* grade in A level

  15. UMS Grade Mark Thresholds

  16. Practical tasks

  17. Task types • Three types of task – provided by OCR • 1. Qualitative task [10 marks] • 2. Quantitative task [15 marks] • 3. Evaluative task [15 marks] • One mark from each task type • Best mark from each task type counts

  18. Qualitative /10 OCR Quantitative /15 Total/40 Evaluative /15 Marks Mark schemes provided by OCR will be specific Assessed tasks will be moderated

  19. Internal Assessment - Task 1 • Qualitative Task – 10 marks • Perform the task competently • Observe accurately • Record reliably • Organise results • May require students to come to a valid conclusion

  20. The Qualitative Task Record reliably • simple details of colour changes, smells etc Organise Results • marks may be awarded for the suitability of the presentation of results Reach Valid Conclusions • only direct conclusions from observations

  21. The Quantitative Task Analyse, interpret and evaluate results • identify anomalous results • draw and interpret graphs • perform numerical calculations • Identify obvious weaknesses in the procedure and measurements Reach a valid conclusion • direct conclusions from the analysis of the data

  22. Internal Assessment - Task 2 Quantitative Task – 15 marks • Use apparatus competently and safely • Record results to an appropriate precision • Analyse, interpret and evaluate results • Reach a valid conclusion

  23. Internal Assessment - Task 3 • Evaluative Task – 15 marks • Recognise trends in data and identify anomalies • Assess reliability and accuracy of procedures and measurements • Understand and select suitable improvements to procedures and measurements Usually will be based on supplied data

  24. The Evaluative Task Assess the reliability and accuracy of procedures and measurements • understand the reasons for using a particular procedure • identify significant weaknesses in the procedure followed and/or measurements made • assess quantitatively the accuracy of quantities used mass, volume (measuring cylinders and/or volumetric apparatus) and temperature

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