OCR A A-level Chemistry Year 12 revision

Topic 1: Development of practical skills in chemistry

It builds on what you learned at GCSE in Practical and maths skills, and takes it further.

There are 11 parts: we start with planning investigations, and finish with graphs.

1. 1.1Planning investigations: variables, hypotheses and choosing apparatus and techniquesFree 39 questions
2. 1.2Safe working: hazards, risk assessment and environmental and ethical considerations30 questions
3. 1.3Using apparatus accurately: balances, burettes, pipettes, volumetric flasks, gas syringes and thermometers74 questions
4. 1.4Basic techniques: heating, filtration, drying and heating to constant mass74 questions
5. 1.5Measurement uncertainty, percentage error and improving precision33 questions
6. 1.6Recording, presenting and evaluating results: tables, graphs, anomalies and conclusions34 questions
7. 1.7Using ICT and data loggers, researching and referencing sources41 questions
8. 1.8Arithmetic: standard form, significant figures, unit conversions and estimationFree 16 questions
9. 1.9Ratios, fractions, percentages and proportionality in chemical calculations26 questions
10. 1.10Algebra: rearranging and substituting into equations (n = m/M, c = n/V, pV = nRT, Kc)40 questions
11. 1.11Graphs: plotting, line of best fit, gradients, tangents and intercepts34 questions

Topic 2.1.1: Atomic structure and isotopes

It builds on what you learned at GCSE in Particles, and takes it further.

There are 2 parts: we start with atomic structure, and finish with development of models of the atom and evidence for atomic structure.

1. 2.1.1.1Atomic structureFree 55 questions
2. 2.1.1.2Development of models of the atom and evidence for atomic structure60 questions

Topic 2.1.2: Compounds, formulae and equations

It builds on what you learned at GCSE in Chemical reactions, and takes it further.

We will go through it step by step.

1. 2.1.2.1Writing formulae of ions and compounds, balanced equations, state symbols and ionic equations45 questions

Topic 2.1.3: Amount of substance

It builds on what you learned at GCSE in Chemical reactions and Monitoring and controlling chemical reactions, and takes it further.

There are 5 parts: we start with amount of substance, and finish with the practical on preparing a standard solution and carrying out an acid-base titration.

1. 2.1.3.1Amount of substance61 questions
2. 2.1.3.2Molar gas volume and gas volume calculations62 questions
3. 2.1.3.3Hydrated salts, water of crystallisation and percentage composition70 questions
4. 2.1.3.4Practical: measuring the molar volume of a gas and determining moles from reacting masses66 questions
5. 2.1.3.5Practical: preparing a standard solution and carrying out an acid-base titrationFree 67 questions

Topic 2.1.4: Acids

It builds on what you learned at GCSE in Chemical reactions, and takes it further.

We will go through it step by step.

1. 2.1.4.1Acids, bases, salts and neutralisation63 questions

Topic 2.1.5: Redox

It builds on what you learned at GCSE in Chemical reactions, and takes it further.

We will go through it step by step.

1. 2.1.5.1Oxidation, reduction and redox equations54 questions

Topic 2.2: Electrons, bonding and structure

It builds on what you learned at GCSE in Elements, compounds and mixtures, and takes it further.

There are 3 parts: we start with ionic and metallic bonding, and how structure affects physical properties, and finish with geometry.

1. 2.2.1Ionic and metallic bonding, and how structure affects physical properties23 questions
2. 2.2.2BondingFree 38 questions
3. 2.2.3Geometry: bond angles, 3D molecular shapes and drawing molecules66 questions

Topic 3.1.1: Periodicity

It builds on what you learned at GCSE in Predicting and identifying reactions and products, and takes it further.

We will go through it step by step.

1. 3.1.1.1PeriodicityFree 17 questions

Topic 3.1.2: Group 2

It builds on what you learned at GCSE in Predicting and identifying reactions and products, and takes it further.

We will go through it step by step.

1. 3.1.2.1Group 2, the alkaline earth metals29 questions

Topic 3.1.3: The halogens

It builds on what you learned at GCSE in Predicting and identifying reactions and products, and takes it further.

We will go through it step by step.

1. 3.1.3.1Group 7, the halogens13 questions

Topic 3.1.4: Qualitative analysis

It builds on what you learned at GCSE in Predicting and identifying reactions and products, and takes it further.

We will go through it step by step.

1. 3.1.4.1Qualitative analysis: flame tests and tests for carbonate, sulfate, halide, hydroxide and ammonium ions71 questions

Topic 3.2.1: Enthalpy changes

It builds on what you learned at GCSE in Chemical reactions, and takes it further.

There are 2 parts: we start with energetics, and finish with the practical on measuring enthalpy changes by calorimetry (neutralisation, displacement, solution and combustion).

1. 3.2.1.1Energetics64 questions
2. 3.2.1.2Practical: measuring enthalpy changes by calorimetry (neutralisation, displacement, solution and combustion)65 questions

Topic 3.2.2: Reaction rates

It builds on what you learned at GCSE in Monitoring and controlling chemical reactions, and takes it further.

There are 2 parts: we start with kinetics, and finish with the practical on investigating rates of reaction by gas collection, clock reactions and continuous monitoring.

1. 3.2.2.1Kinetics67 questions
2. 3.2.2.2Practical: investigating rates of reaction by gas collection, clock reactions and continuous monitoring72 questions

Topic 3.2.3: Chemical equilibrium

It builds on what you learned at GCSE in Monitoring and controlling chemical reactions, and takes it further.

We will go through it step by step.

1. 3.2.3.1Chemical equilibria and KcFree 27 questions

Topic 4.1.1: Basic concepts of organic chemistry

It builds on what you learned at GCSE in Global challenges, and takes it further.

We will go through it step by step.

1. 4.1.1.1Introduction to organic chemistryFree 26 questions

Topic 4.1.2: Alkanes

It builds on what you learned at GCSE in Global challenges, and takes it further.

There are 2 parts: we start with crude oil, fractional distillation, fuels and pollution from combustion, and finish with alkanes.

1. 4.1.2.1Crude oil, fractional distillation, fuels and pollution from combustion20 questions
2. 4.1.2.2Alkanes30 questions

Topic 4.1.3: Alkenes

It builds on what you learned at GCSE in Global challenges, and takes it further.

We will go through it step by step.

1. 4.1.3.1AlkenesFree 25 questions

Topic 4.2.1: Alcohols

It builds on what you learned at GCSE in Global challenges, and takes it further.

There are 2 parts: we start with alcohols, and finish with the practical on preparing an organic liquid by heating under reflux and distillation (e.g. oxidation of an alcohol).

1. 4.2.1.1Alcohols25 questions
2. 4.2.1.2Practical: preparing an organic liquid by heating under reflux and distillation (e.g. oxidation of an alcohol)62 questions

Topic 4.2.2: Haloalkanes

It builds on what you learned at GCSE in Global challenges, and takes it further.

There are 2 parts: we start with halogenoalkanes, and finish with ozone depletion by CFCs and radical chain reactions in the atmosphere.

1. 4.2.2.1Halogenoalkanes32 questions
2. 4.2.2.2Ozone depletion by CFCs and radical chain reactions in the atmosphere30 questions

Topic 4.2.3: Organic synthesis

It builds on what you learned at GCSE in Global challenges, and takes it further.

There are 2 parts: we start with organic synthesis, and finish with the practical on purifying an organic liquid using a separating funnel, drying agent and redistillation.

1. 4.2.3.1Organic synthesis: reaction pathways and multi-step routes between functional groups21 questions
2. 4.2.3.2Practical: purifying an organic liquid using a separating funnel, drying agent and redistillation34 questions

Topic 4.2.4: Analytical techniques

It builds on what you learned at GCSE in Predicting and identifying reactions and products, and takes it further.

There are 2 parts: we start with organic analysis, and finish with infrared absorption, bond vibrations and the greenhouse effect.

1. 4.2.4.1Organic analysis59 questions
2. 4.2.4.2Infrared absorption, bond vibrations and the greenhouse effect16 questions

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