Explore the skills · QCAA
Chemistry
QCAA External Exam Revision · Units 3 & 4
Explore the subject and its skills. Full lessons, examples and practice require subject access. Accounts and purchasing are not open yet.
Find a skill
Chemical equilibrium systems
- Open, closed and reversible systemsRevision skill
- Dynamic equilibrium and equilibrium positionRevision skill
- Equilibrium concentration–time graphsRevision skill
- Activation energy and reaction reversibilityRevision skill
- Temperature changes and equilibriumRevision skill
- Concentration, pressure and catalysts at equilibriumRevision skill
- Equilibrium-law expressionsRevision skill
- Magnitude of Kc and extent of reactionRevision skill
- Reaction quotient and equilibrium shiftsRevision skill
- Kc and equilibrium-concentration calculationsRevision skill
- Solubility-product calculationsRevision skill
- Acid/base properties, strength and concentrationRevision skill
- Kw, pH, pOH and ion concentrationsRevision skill
- Brønsted–Lowry conjugates and amphiprotic speciesRevision skill
- Buffer actionRevision skill
- Ka, Kb, pKa and pKbRevision skill
- Acid–base indicators and indicator selectionRevision skill
- Acid–base and conductometric titration curvesRevision skill
- Volumetric-analysis calculationsRevision skill
Oxidation and reduction
- Recognising oxidation and reductionRevision skill
- Oxidation states and transition-metal nomenclatureRevision skill
- Half-equations and redox equations in acidic conditionsRevision skill
- Galvanic and electrolytic cellsRevision skill
- Galvanic-cell diagrams and componentsRevision skill
- Standard electrode potentials and their limitationsRevision skill
- Cell potential, spontaneity and agent strengthRevision skill
- Electrolysis products in molten and aqueous electrolytesRevision skill
- Electroplating and copper purificationRevision skill
- Quantitative electrolysisRevision skill
Properties and structure of organic materials
- Organic classes and functional groupsRevision skill
- Homologous series, saturation and formula typesRevision skill
- Structural formulas and IUPAC nomenclatureRevision skill
- Structural and geometrical isomersRevision skill
- Optical isomers and chiralityRevision skill
- Organic physical properties and homologous-series trendsRevision skill
- Organic reaction equationsRevision skill
- Classifying organic reactionsRevision skill
- Primary, secondary and tertiary carbon environmentsRevision skill
- Carboxylic acids, amines and reversible esterificationRevision skill
- Chemical tests for alkenes and alcohol classesRevision skill
- Markovnikov’s ruleRevision skill
- Organic reaction pathwaysRevision skill
- Amino acids, peptides and carbohydratesRevision skill
- Polymer structures and propertiesRevision skill
- Amino-acid acid–base behaviour and zwitterionsRevision skill
- Amino-acid chromatography and electrophoresisRevision skill
- Mass spectrometry and infrared spectroscopyRevision skill
Chemical synthesis and design
- Haber and contact processesRevision skill
- Ethanol production and hydrogen fuel cellsRevision skill
- Synthesis yield and limiting reagentsRevision skill
- Optimising synthesis yield and rateRevision skill
- Addition-polymer synthesisRevision skill
- Condensation polymers, peptides and carbohydratesRevision skill