Cambridge A-level Chemistry Year 13 revision

Topic 23: Chemical energetics

It builds on what you learned at AS Level in Chemical energetics, and takes it further.

We will go through it step by step.

1. 23.1ThermodynamicsFree 28 questions

Topic 24: Electrochemistry

It builds on what you learned at AS Level in Electrochemistry, and takes it further.

There are 2 parts: we start with electrode potentials and electrochemical cells, and finish with the practical on measuring the EMF of electrochemical cells and testing electrode potential predictions.

1. 24.1Electrode potentials and electrochemical cells24 questions
2. 24.2Practical: measuring the EMF of electrochemical cells and testing electrode potential predictions32 questions

Topic 25: Equilibria

It builds on what you learned at AS Level in Equilibria, and takes it further.

There are 4 parts: we start with equilibrium constant Kc, and finish with the practical on pH curves, determining Ka of a weak acid and making and testing buffers.

1. 25.1Equilibrium constant Kc: expressions, units, calculations and the effect of temperature64 questions
2. 25.2Equilibrium constant Kp15 questions
3. 25.3Acids, bases and buffers38 questions
4. 25.4Practical: pH curves, determining Ka of a weak acid and making and testing buffers46 questions

Topic 26: Reaction kinetics

It builds on what you learned at AS Level in Reaction kinetics, and takes it further.

There are 3 parts: we start with rate equations, and finish with the practical on measuring reaction rates by initial-rate and continuous-monitoring methods (including iodine–propanone and clock reactions).

1. 26.1Rate equations63 questions
2. 26.2Half-life of first-order reactions and concentration–time graphs73 questions
3. 26.3Practical: measuring reaction rates by initial-rate and continuous-monitoring methods (including iodine–propanone and clock reactions)Free 78 questions

Topic 28: Chemistry of transition elements

It builds on what you learned at AS Level in The Periodic Table: chemical periodicity, and takes it further.

There are 6 parts: we start with transition metals, and finish with the practical on preparation of a transition metal complex.

1. 28.1Transition metals23 questions
2. 28.2Reactions of ions in aqueous solution58 questions
3. 28.3Redox titrations: manganate(VII), dichromate(VI) and iodine–thiosulfate calculations76 questions
4. 28.4Colorimetry and visible spectroscopy: determining the concentration and formula of complex ions68 questions
5. 28.5Practical: test-tube reactions of transition metal ions (precipitation, ligand exchange, redox)30 questions
6. 28.6Practical: preparation of a transition metal complex38 questions

Topic 29: An introduction to A Level organic chemistry

It builds on what you learned at AS Level in An introduction to AS Level organic chemistry, and takes it further.

We will go through it step by step.

1. 29.1Optical isomerismFree 23 questions

Topic 30: Hydrocarbons

It builds on what you learned at AS Level in Hydrocarbons, and takes it further.

There are 3 parts: we start with aromatic chemistry, and finish with carbon–carbon bond formation.

1. 30.1Aromatic chemistryFree 23 questions
2. 30.2Directing effects of substituents in electrophilic substitution of benzene derivatives34 questions
3. 30.3Carbon–carbon bond formation: nitriles, Friedel–Crafts reactions and Grignard reagents20 questions

Topic 32: Hydroxy compounds

It builds on what you learned at AS Level in Hydroxy compounds, and takes it further.

We will go through it step by step.

1. 32.1Phenols: acidity, reactions with bromine, bases and acyl chlorides, and the iron(III) chloride testFree 51 questions

Topic 33: Carboxylic acids and derivatives

It builds on what you learned at AS Level in Carbonyl compounds and Carboxylic acids and derivatives, and takes it further.

There are 3 parts: we start with carboxylic acids and derivatives, and finish with the iodoform (triiodomethane) test for CH3CO– and CH3CH(OH)– groups.

1. 33.1Carboxylic acids and derivatives41 questions
2. 33.2Aldehydes and ketones21 questions
3. 33.3The iodoform (triiodomethane) test for CH3CO– and CH3CH(OH)– groups36 questions

Topic 34: Nitrogen compounds

It builds on what you learned at AS Level in Nitrogen compounds, and takes it further.

There are 3 parts: we start with amines, and finish with diazonium salts and azo dyes.

1. 34.1Amines16 questions
2. 34.2Amino acids, proteins and DNA41 questions
3. 34.3Diazonium salts and azo dyes: diazotisation and coupling36 questions

Topic 35: Polymerisation

It builds on what you learned at AS Level in Polymerisation, and takes it further.

We will go through it step by step.

1. 35.1Polymers28 questions

Topic 36: Organic synthesis

It builds on what you learned at AS Level in Organic synthesis, and takes it further.

We will go through it step by step.

1. 36.1Organic synthesisFree 23 questions

Topic 37: Analytical techniques

It builds on what you learned at AS Level in Analytical techniques, and takes it further.

There are 4 parts: we start with nuclear magnetic resonance spectroscopy, and finish with the practical on separating mixtures by thin-layer chromatography and calculating Rf values.

1. 37.1Nuclear magnetic resonance spectroscopy64 questions
2. 37.2Chromatography65 questions
3. 37.3Combined structure determination using mass spectrometry, IR, 13C and 1H NMR data39 questions
4. 37.4Practical: separating mixtures by thin-layer chromatography and calculating Rf values79 questions

Topic P: Planning, analysis and evaluation (Paper 5)

There are 6 parts: we start with planning, analysing and evaluating practical investigations (variables, apparatus, reliability, validity), and finish with maths skills.

1. P.1Planning, analysing and evaluating practical investigations (variables, apparatus, reliability, validity)34 questions
2. P.2Practical: preparing a pure organic solid (e.g. aspirin), recrystallisation and melting-point purity test82 questions
3. P.3Practical: test-tube identification of organic functional groups (alkene, halogenoalkane, alcohol, carbonyl, carboxylic acid, phenol)58 questions
4. P.4Maths skills: logarithms and antilogs, rearranging equations, pH, pKa and Kw calculationsFree 53 questions
5. P.5Maths skills: graphs, tangents, gradients and intercepts (rate graphs, Arrhenius ln k against 1/T)66 questions
6. P.6Maths skills: significant figures, units, percentage error and uncertainty in measurements36 questions

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