Process
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
Transition Metals
Transition metals as catalysts
- 3 things to know
- Papers 1 and 3
Overview
Heterogeneous and homogeneous catalysis by transition metals, vanadium(V) oxide in the contact process, adsorption, reaction and desorption in a catalytic converter, Fe²⁺ catalysing the reaction between I⁻ and S₂O₈²⁻, and Mn²⁺ as an autocatalyst in the reaction of MnO₄⁻ with C₂O₄²⁻.
What you need to know
Answer each one before you reveal it.
Your recallNot started
Key term
Define a heterogeneous catalyst.
Process
In the contact process, how does V₂O₅ oxidise SO₂ to SO₃?
Questions from this subtopic
Each one with the model answer underneath.
- 1
What types of catalysis can transition metals and their compounds exhibit?
Model answer
Both heterogeneous and homogeneous catalysis.
- 2
Define a heterogeneous catalyst.
Model answer
A heterogeneous catalyst occupies a different physical state from what it is catalysing, so the reaction happens on its surface.
- 3
In the contact process, how does V₂O₅ oxidise SO₂ to SO₃?
Model answer
V₂O₅ oxidises SO₂ to SO₃ while being reduced from V(V) to V(IV).
- 4
How is V₂O₄ regenerated back to V₂O₅ in the contact process?
Model answer
V₂O₄ is re-oxidised by O₂ back to V₂O₅.
- 5
What is the first step in how a catalytic converter decreases CO and NO emissions?
Model answer
CO and NO stick to the surface of the catalyst.
- 6
What happens to the bonds in CO and NO molecules after they are adsorbed onto a catalytic converter surface?
Model answer
The bonds in the adsorbed molecules are weakened, allowing chemical reaction between them.
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