Key term
Edexcel A-Level Chemistry 9CH0
Atomic Structure and the Periodic Table
Bonding and Structure
Inorganic Chemistry and the Periodic Table
Topic overviewFlame tests and how they workThermal decomposition of nitrates and carbonatesCarrying out flame tests and testing the gasesGroup 2 elements and their compoundsTrends in Group 7 and predicting fluorine and astatineHalogen displacement reactionsDisproportionation and the reactions of chlorineHalides with concentrated sulfuric acid, and the hydrogen halidesTesting for halide ions with silver nitrateTesting for carbonate and hydrogencarbonate ionsTesting for sulfate and ammonium ions
Formulae, Equations and Amounts of Substance
Topic overviewThe mole, molar mass and empirical formulaThe ideal gas equation and molar volumeEquations, concentration and reacting quantitiesStandard solutions, titration and uncertaintyPercentage yield, atom economy and acid reactionsCore practicals 1 to 3Empirical formula and water of crystallisation by experimentApparatus, uncertainty and mathematical skills
Organic Chemistry I
Topic overviewFormulae, homologous series and functional groupsIUPAC nomenclatureTypes of organic reaction and structural isomerismStereoisomerism and E/Z nomenclaturePractical techniques in organic chemistryAlkanes, crude oil and combustion pollutantsRadical substitutionAlkenes, the double bond and hydrogenationElectrophilic addition, Markovnikov's rule and the test for an alkeneAddition polymers and waste polymersNucleophilic substitution of halogenoalkanesRates of hydrolysis and the SN1 and SN2 mechanismsClassifying and oxidising alcoholsAlcohols: practical techniques and the core practicals
Modern Analytical Techniques I
Energetics I
Kinetics I
Equilibrium I
Acid-Base Equilibria
Energetics II
Redox II
Transition Metals
Topic overviewElectron configuration and what makes a transition metalComplex ions, ligands and the colour of transition metal ionsCoordination number, monodentate ligands and the shapes of complexesBidentate and multidentate ligands, and ligand exchangeVanadium and chromium chemistryReactions with sodium hydroxide and ammoniaCobalt and copper complexesLigand exchange, amphoteric behaviour and the chelate effectTransition metals as catalysts
Kinetics II
Organic Chemistry II
Topic overviewChiralityAldehydes, ketones and their oxidationReduction and nucleophilic addition of HCNTesting for a carbonyl group: 2,4-DNPH and the iodoform reactionCarboxylic acids and their reactionsEsters and acyl chloridesReflux, extraction and recrystallisationDistillation, melting temperature and working safely
Organic Chemistry III
Topic overviewThe structure of benzene and the evidence for itElectrophilic substitution of benzeneNitration, halogenation, Friedel-Crafts and phenolAmines: structure and basicityReactions of amines and preparing themAmides and condensation polymersAmino acids, zwitterions and proteinsEmpirical and molecular formulae from analytical dataGrignard reagents and multi-step synthesisPurification techniques and the aspirin preparation
Organic Chemistry I
Electrophilic addition, Markovnikov's rule and the test for an alkene
- 4 things to know
- Papers 2 and 3
Overview
The products of alkenes with halogens, hydrogen halides, steam and acidified potassium manganate(VII), heterolytic fission and the electrophilic addition mechanisms for bromine and HBr, carbocation stability and the major product from an unsymmetrical alkene, where curly arrows start, and the bromine water test for C=C.
What you need to know
Answer each one before you reveal it.
Your recallNot started
Process
Why are tertiary carbocations more stable than primary carbocations?
Key term
Which reagent tests for a carbon-carbon double bond, and what do you see if one is present?
Key term
What conditions are required for the reaction of an alkene with steam to produce an alcohol?
Questions from this subtopic
Each one with the model answer underneath.
- 1
What type of product is formed when alkenes react with halogens?
Model answer
Dihalogenoalkanes.
- 2
What product is formed when an alkene reacts with a hydrogen halide?
Model answer
A halogenoalkane.
- 3
What conditions are required for the reaction of an alkene with steam to produce an alcohol?
Model answer
An acid catalyst.
- 4
What product is formed when an alkene reacts with acidified potassium manganate(VII)?
Model answer
A diol.
- 5
In the electrophilic addition of bromine to an alkene, what causes the bromine molecule to become polarised?
Model answer
The π-bond electrons of the alkene attack the bromine molecule, inducing polarisation.
- 6
What two species are formed when the halogen-halogen bond undergoes heterolytic fission during electrophilic addition to an alkene?
Model answer
A carbocation intermediate and a halide ion.
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