Course Units
All six units of the Pearson Edexcel AS & A Level Chemistry specification (WCH). Select a unit to explore topics, notes, and quizzes.
Structure, Bonding and Introduction to Organic Chemistry
IAS • WCH11/01
Foundations of chemistry: formulae and moles, atomic structure and the Periodic Table, bonding and structure, and an introduction to organic chemistry covering alkanes and alkenes.
Energetics, Group Chemistry, Halogenoalkanes and Alcohols
IAS • WCH12/01
Builds on Unit 1 with energy changes, intermolecular forces, the chemistry of Groups 1, 2 and 7, an introduction to kinetics and equilibria, and the organic chemistry of halogenoalkanes and alcohols.
Practical Skills in Chemistry I
IAS • WCH13/01
Externally assessed paper on practical chemistry from Units 1 and 2: planning, implementing, analysing and evaluating experimental work, including the AS core practicals.
Rates, Equilibria and Further Organic Chemistry
IA2 • WCH14/01
Quantitative kinetics, entropy and Gibbs energy, equilibrium constants and acid–base equilibria, plus further organic chemistry of carbonyls, carboxylic acids and chirality.
Transition Metals and Organic Nitrogen Chemistry
IA2 • WCH15/01
Redox equilibria and electrochemical cells, transition metal chemistry and complex ions, arenes, organic nitrogen compounds and modern analytical techniques.
Practical Skills in Chemistry II
IA2 • WCH16/01
Externally assessed paper on practical chemistry from Units 4 and 5: planning, implementing, analysing and evaluating advanced experiments, including the IA2 core practicals.