A-Level Chemistry (Edexcel IAL)

Course Overview 课程介绍

Edexcel IAL 化学采用模块化按 Unit 考试，可重考单模块，化学、医学、药学与材料科学申请核心科目。

Edexcel International A-Level Chemistry is a modular course assessed unit by unit across five written units. Students sit each Unit exam separately and may retake individual units. Content spans atomic structure and bonding, energetics and group chemistry, organic chemistry, rates and equilibria, transition metals and organic nitrogen chemistry, with practical skills examined in Unit 3. A core subject for chemistry, medicine, pharmacy, chemical engineering and materials science.

Key Facts 基本信息

Exam Board (考试局)	Pearson Edexcel International A-Level
Specification Code (代码)	WCH11-15
Structure (结构)	Modular, 5 written units; AS = Units 1-3, A2 = Units 4-5
Grading (评分)	A* - E for full A-Level; a - e for AS
Exam Units (模块)	Modular structure, unit-by-unit assessment, single unit retake allowed
Practical (实验)	Unit 3 Practical Skills in Chemistry I (written practical paper)

AS Syllabus AS 阶段章节（Units 1-3）

Unit 1Atomic Structure and the Periodic Table

Atomic structure, electron configuration, isotopes, mass spectrometry, periodicity and ionisation energies
Unit 1Bonding and Structure

Ionic, covalent, metallic and dative bonding, shapes of molecules (VSEPR), electronegativity, intermolecular forces
Unit 1Introduction to Organic Chemistry

Alkanes, fractional distillation, cracking, isomerism, alkenes, organic reaction mechanisms and nomenclature
Unit 2Energetics

Enthalpy changes, Hess's law, bond enthalpies, calorimetry, experimental determination of enthalpy changes
Unit 2Group Chemistry

Group 1 and Group 2 metals, Group 7 halogens, trends in properties and reactivity, displacement reactions
Unit 2Halogenoalkanes and Alkenes

Nucleophilic substitution and elimination of halogenoalkanes, electrophilic addition to alkenes, polymerisation
Unit 3Practical Skills in Chemistry I

Practical techniques, titrations, qualitative ion analysis, data collection and evaluation (written practical paper)

A2 Syllabus A2 阶段章节（Units 4-5）

Unit 4Kinetics

Rates of reaction, rate equations, orders of reaction, Arrhenius equation, catalysis and reaction mechanisms
Unit 4Chemical Equilibria

Dynamic equilibrium, Le Chatelier's principle, equilibrium constants Kc and Kp, industrial applications
Unit 4Acid-Base Equilibria

pH, Ka and Kw, weak acids and bases, buffer solutions, titration curves and indicators
Unit 4Further Organic Chemistry

Alcohols, carbonyl compounds, carboxylic acids, esters, arenes, chirality and organic synthesis routes
Unit 5Transition Metals

Transition metal properties, complex ions, ligand substitution, redox titrations and colorimetry
Unit 5Organic Nitrogen Chemistry

Amines, amides, amino acids, proteins, condensation polymers and organic synthesis
Unit 5Organic Synthesis and Analysis

NMR spectroscopy, IR spectroscopy, mass spectrometry, chromatography and combined analytical techniques

Exam Structure (Edexcel IAL WCH11-15) 考试结构

Unit 1 (WCH11)	Structure, Bonding and Introduction to Organic Chemistry · 1h30m · 20% of IAL (40% of AS)
Unit 2 (WCH12)	Energetics, Group Chemistry, Halogenoalkanes and Alkenes · 1h30m · 20% of IAL (40% of AS)
Unit 3 (WCH13)	Practical Skills in Chemistry I · 1h20m · 10% of IAL (20% of AS)
Unit 4 (WCH14)	Rates, Equilibria and Further Organic Chemistry · 1h45m · 25% of IAL
Unit 5 (WCH15)	Transition Metals and Organic Nitrogen Chemistry · 1h45m · 25% of IAL
Modular Feature	Modular structure, unit-by-unit assessment, single unit retake allowed

Suitable Majors & Pathway 适合专业与升学路径

适合化学、医学、药学、化工、材料科学与生命科学专业，是英国医学与化学相关专业的必选科目。

Chemistry is essential for medicine, dentistry, veterinary science, pharmacy, chemistry, chemical engineering, biochemistry and materials science. Combined with Biology and Mathematics, it supports applications to life science and biomedical programmes. The modular Edexcel IAL format allows students to retake individual units to strengthen their final grade before university application.