2014 Revision Chemistry as Level
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Transcript of 2014 Revision Chemistry as Level
CHEMISTRY AS LEVEL Exam Board and Course
Edexcel GCE (from 2008) Chemistry
Link to Specification
http://www.edexcel.com/quals/gce/gce08/chemistry/Pages/default.aspx
Revision Topic List
Unit 1 1.3 Formulae and Moles - writing equations (full and ionic)
- calculations including the use of mass, volume, yields, atom economy and Avogadro’s number
- how to prepare a salt and a double salt - Interpret results from reactions including displacement and precipitation reactions.
1.4 Energetics - Construct enthalpy diagrams for exothermic and endothermic reactions
- Define and calculate key enthalpy terms including enthalpy of combustion, formation, neutralization and atomization - Apply Hess’ Law to calculate enthalpy changes using bond enthalpies - Use the expression E = m.s.ΔT
1.5 Atomic Structure and the Periodic Table - Describe principles of mass spectroscopy and interpret spectra - Explain how ionization energies relate to the periodic table
- Describe and explain electronic configuration in terms of 1s notation and electron density plots - Explain physical trends in the Periodic table eg. Melting temperatures and ionization energies
1.6 Bonding
- Describe and explain ionic, covalent and metallic bonding in terms of electrons - Represent ionic and covalent bonding using dot and cross diagrams - Identify stages within Born-Haber cycles and use calculations to comment on stability and polarisability of compounds
1.7 Introductory Organic Chemistry - Name and draw organic compounds
- Show the presence of isomers within alkanes and alkenes including cis/trans and e/z isomerism
- Describe reactions of alkanes and alkenes - Draw and explain mechanisms for free radical substitution of alkanes, electrophilic addition and polymerization of alkenes - Describe tests for alkenes - Interpret data about lifecycles of polymers and comment on the need for alternative fuels.
Unit 2 Shapes of Molecules and Ions
- Use electron-pair repulsion theory to predict the shapes and bond angles of molecules
- Draw 3-D diagrams for each different shape - Describe and explain the different structures of carbon in terms of
bond angles and shapes. Intermediate bonding and Polarity
- Explain electronegativity and use it to describe polarity in covalent bonding
- Predict which molecules have polar bonds and which are polar (distinguish between the two terms)
Intermolecular Forces (IMF)
- Describe different intermolecular forces in compounds - Relate IMF to physical properties (melting point/boiling
point/volatility etc) - Relate solubility to the types and amounts of IMF
Redox
- define key terms including oxidation, reduction, oxidation number - Write half redox equations and full balanced redox equations - use oxidation numbers to show oxidation/reduction
The Periodic Table – Groups 2 and 7
- State and explain trends down the groups for physical properties - Predict the properties of Astatine and Fluorine based on trends - Give and explain trends in solubility and thermal decomposition of
gp 2 nitrates and carbonates (including how to carry out the tests) - State tests for group 2 cations and group 7 anions - Describe the methods and observations for reactions of group 7
including halogens and halides - Carry out calculations for iodine-thiosulfate titrations
Kinetics
- state and explain factors that affect rate of reaction - relate explanations to Maxwell-Boltzmann graphs and activation
energy Chemical Equilibria
- Explain and give examples of dynamic equilibria - Explain how factors that affect rate affect the position of
equilibrium
Organic Chemistry + Mechanisms
- Name and draw structures for alcohols and halogenoalkanes - Reactions and tests for alcohols, and halogenoalkanes - Classify different reactions in terms of nucleophilic substitution - Describe and draw mechanisms including free radical substitution - Relate free radical substitution to the depletion of the ozone layer
Mass Spectra and IR
- Recall the basic principles of mass spec and IR - Interpret spectra and use wavenumbers to identify groups
Green Chemistry
- Explain how industries are becoming more sustainable - Relate green chemistry to production of CO2 and the depletion of
the ozone layer - Discuss carbon neutrality
Recommended revision books
Edexcel AS revision guide (as provided) CGP revision guides Jim Clarke Calculations (as provided)
Recommended revision websites
www.edexcel.com (past papers) www.chemguide.co.uk www.docbrown.info