Study guides

Acids and bases (A-level only)

AQA·A-Level

7405

Acids and bases becomes a mark-rich A-level topic once you connect proton transfer, equilibrium and logarithmic pH calculations. This guide shows exactly how examiners credit Brønsted–Lowry definitions, $K_w$ and $K_a$ methods, buffers, indicators and pH curves—and how to avoid the usual calculation traps.

Alcohols

AQA·A-Level

7405

Master the production, classification, and reactions of alcohols. This topic is a heavy hitter for marks in organic chemistry, testing your ability to link reaction conditions to specific products.

Alkanes

AQA·A-Level

Master AQA A-Level Chemistry's core topic, Alkanes (3.2). This guide breaks down everything from boiling point trends governed by van der Waals forces to the critical mechanisms of combustion and free-radical substitution, providing examiner insights to help you secure top marks.

Alkenes

AQA·A-Level

Unlock the secrets of carbon-based life with this essential guide to Organic Chemistry. From mastering IUPAC nomenclature to predicting complex reaction pathways, this module builds the foundation for understanding everything from fuels to pharmaceuticals."

Amino acids, proteins and DNA (A-level only)

AQA·A-Level

7405

Master the chemistry of life. This A-level extension guide explores the structure, bonding, and reactions of amino acids, proteins, and DNA, crucial for understanding enzyme catalysis and anti-cancer drug mechanisms.

Atomic structure

AQA·A-Level

7405

Atomic structure is the foundation of all chemistry. Understanding protons, neutrons, electrons, and how they arrange themselves explains why elements behave the way they do—and it's a heavily tested, high-mark topic in the exam.

Atomic Structure

WJEC·A-Level

Master the core of A-Level Chemistry with our guide to Atomic Structure. We'll break down quantum orbitals, ionisation energy trends, and mass spectrometry to help you secure top marks in your WJEC exams.

Atomic Structure

Pearson Edexcel·A-Level

Master the fundamental building blocks of chemistry with this comprehensive guide on Atomic Structure and the Periodic Table. Understanding atoms, isotopes, and electron configurations is essential for scoring high marks, as these concepts form the foundation for almost every other topic in the specification.

Atomic Structure

OCR·A-Level

Master the fundamental building blocks of chemistry that underpin the entire A-Level course. This guide covers atomic structure, the mole concept, stoichiometry, and redox reactions—essential topics that examiners love to test and which are critical for success in future modules."

Atomic structure and the periodic table

AQA·GCSE

8462

Master the fundamental building blocks of all matter. This topic covers the structure of atoms, the history of atomic models, and how the periodic table predicts chemical properties—essential knowledge that underpins the entire GCSE Chemistry specification.

Bonding, structure and properties

Eduqas·GCSE

WJEC-GCSE-Chemistry

Master the microscopic world that determines the macroscopic properties of all materials. This topic is the foundation of Chemistry, explaining why diamonds are hard, why metals conduct electricity, and how nanoparticles are revolutionising modern technology.

Bonding, structure, and the properties of matter

AQA·GCSE

8462

Master the fundamentals of how atoms bond and arrange themselves to form everything around us. This topic is a cornerstone of GCSE Chemistry, essential for explaining why materials behave the way they do and unlocking high marks across your exams.

Carbon compounds

Eduqas·GCSE

WJEC-GCSE-Chemistry

Master the chemistry of carbon compounds, from the fractional distillation of crude oil to the creation of complex polymers. This topic is heavily examined every year and forms the foundation for understanding fuels, plastics, and the petrochemical industry.

Chemical analysis

AQA·GCSE

8462

Master the detective work of chemistry. Learn how to identify unknown substances, calculate Rf values, and use both chemical tests and modern instrumental methods to secure top marks.

Chemical changes

AQA·GCSE

8462

Master the transformative world of Chemical Changes! This topic covers the reactivity series, metal extraction, acids and bases, and the complex rules of electrolysis, providing the foundation for understanding industrial chemistry and earning high marks in your exams.

Chemical changes

Pearson Edexcel·GCSE

Pearson-GCSE-Chemistry

Master the fundamental properties of acids, alkalis, and neutralisation reactions. This topic is heavily examined every year and forms the foundation for understanding complex chemical processes and quantitative analysis.

Chemical equilibria, Le Chatelier’s principle and Kc

AQA·A-Level

7405

An examiner-focused guide to dynamic equilibrium, Le Chatelier’s principle, industrial compromise conditions and the Kc extension. It combines mark-scheme language, worked solutions, visual assets, diagrams and a 10-minute audio recap.

Chemical formulae, equations and amount of substance

Eduqas·GCSE

WJEC-GCSE-Chemistry

Mastering chemical formulae and the mole concept is the key to unlocking quantitative chemistry. This topic bridges the atomic world with the macroscopic world, forming the foundation for calculating reacting masses, gas volumes, and concentrations.

Chemistry of acids

Eduqas·GCSE

WJEC-GCSE-Chemistry

Master the fundamental reactions, pH scale, and titration calculations that examiners test every year. This topic forms the backbone of quantitative chemistry and is essential for securing top grades in your GCSE.

Chemistry of the atmosphere

AQA·GCSE

8462

Master the 4.6 billion-year story of our planet's atmosphere, from its fiery volcanic origins to the modern pollution challenges we face today. This topic is heavily tested on extended response questions, so precision with terminology like 'greenhouse effect' and 'incomplete combustion' is essential for securing top marks.

Cracking

OCR·GCSE

This guide breaks down the crucial industrial process of cracking for your OCR GCSE Chemistry exam. Discover how we turn less useful long-chain hydrocarbons into high-demand fuels and plastics, and master the equations and practical tests that will earn you top marks."

Electrode potentials and electrochemical cells (A-level only)

AQA·A-Level

7405

An exam-focused A-level guide to electrode potentials and electrochemical cells. It covers standard conditions, the standard hydrogen electrode, cell notation, EMF calculations, feasibility, fuel cells and practical technique, using authentic examiner language and targeted retrieval practice.

Energy changes

AQA·GCSE

8462

Master the critical differences between exothermic and endothermic reactions, learn to interpret reaction profiles, and calculate bond energies. This topic is a guaranteed mark-earner if you understand the direction of energy transfer.

Energy changes in chemistry

Eduqas·GCSE

WJEC-GCSE-Chemistry

Master the core concepts of Energy Changes in Chemistry, from identifying exothermic and endothermic reactions to mastering reaction profiles and calculating bond energies. This topic is essential for your GCSE exams, combining conceptual understanding with vital mathematical skills.

Equilibrium constant Kp for homogeneous systems (A-level only)

AQA·A-Level

7405

Master the equilibrium constant Kp for homogeneous gas systems in this A-Level Chemistry deep dive. Learn how to derive partial pressures, construct Kp expressions, and confidently predict how temperature and pressure shifts affect equilibrium.

Extracting metals and equilibria

Pearson Edexcel·GCSE

Pearson-GCSE-Chemistry

Master the principles of reversible reactions, dynamic equilibrium, and the industrial Haber process. This topic is heavily tested across all exam boards and connects theoretical chemistry to real-world industrial applications, making it essential for securing top grades.

Formulae, equations and hazards

Pearson Edexcel·GCSE

Pearson-GCSE-Chemistry

Master the language of chemistry. This topic covers chemical formulae, balancing equations, and interpreting hazard symbols—essential skills that appear in almost every GCSE exam paper and form the foundation for all chemical calculations.

Fuels and Earth science

Pearson Edexcel·GCSE

Pearson-GCSE-Chemistry

Master the evolution of the Earth's atmosphere, the greenhouse effect, and climate change. This topic is heavily tested every year, especially on linking physical and biological processes to atmospheric changes and distinguishing between the natural greenhouse effect and human-driven climate change.

Group 1 – The Alkali Metals

OCR·GCSE

Unlock top marks in GCSE Chemistry by mastering the properties and reactions of the Group 1 Alkali Metals. This guide breaks down the essential concepts, from reactivity trends to exam-winning answer structures, turning confusion into confidence."

Group 2, the alkaline earth metals

AQA·A-Level

7405

An exam-focused guide to Group 2 trends, reactions, solubility, applications and sulfate testing. It explicitly distinguishes GCSE enrichment from the AQA A-level 3.2.2 source reference and builds explanation chains that gain marks.