Edexcel International GCSE (IGCSE) Chemistry Papers 1 & 2

Edexcel International GCSE (IGCSE) Chemistry — Complete Notes

Specification-mapped Chemistry with every calculation worked and every common trap named.

Edexcel Chemistry loses students marks in predictable places: units in calculations, conditions in equations, precision in practicals. These notes map the specification and flag every trap before it costs you.

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Edexcel International GCSE (IGCSE) Chemistry Complete Notes eBook cover for 4CH1

20,000+ copies sold in 2025 40+ countries 21+ years teaching 5 published textbooks

Is this the right book for you?

Board: Edexcel (Pearson)
Specification: 4CH1 (latest)
Papers covered: Papers 1 and 2
Suitable for: Linear and modular routes

Written for students sitting Edexcel International GCSE (IGCSE) Chemistry 4CH1 — usable for both the linear and modular systems. Not your syllabus? Use the book finder.

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Where the marks leak

Edexcel Chemistry is lost in predictable places — this book closes them

Most dropped marks in 4CH1 are not knowledge gaps; they are missed units, missing conditions and imprecise wording. These notes are built to eliminate exactly those.

Map the spec

Content follows the 4CH1 specification point by point, tagged to Paper 1 and Paper 2.
Work every calculation

Moles, concentration, yield and electrolysis solved step by step, with units carried through.
Name the trap

The specific mistakes examiners see — wrong conditions, missing state symbols — are flagged in place.
Lock it with recall

Mnemonics, flashcards and topic quizzes turn the wording into something you can reproduce under pressure.

Built for the exam

What makes these Chemistry notes score

Specification-mapped

Every 4CH1 point covered in order, tagged to Paper 1 and Paper 2.

Worked calculations

Moles, concentration, yield and electrolysis solved step by step with units.

Named exam traps

The exact mistakes examiners penalise, flagged where they happen.

Required practicals

Every required practical with method, results and mark-scheme wording.

Mnemonics

Memory hooks for reactivity, tests and trends that are easy to lose.

Quizzes & flashcards

Active recall after each topic so the wording sticks.

See inside

Watch the walkthrough, then flip the pages

Sample pages — Edexcel IGCSE Chemistry

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The best value is the two-book Edexcel International GCSE (IGCSE) bundle. Prefer one subject? The complete Chemistry notes are $25 on their own. Instant access on any device.

Edexcel International GCSE (IGCSE) Biology and Chemistry Complete Notes eBooks tied together with a gold gift ribbon

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Edexcel International GCSE (IGCSE) Biology + Chemistry bundle

Both Edexcel International GCSE (IGCSE) science books in one purchase — the complete 4BI1 Biology notes and 4CH1 Chemistry notes.

Edexcel International GCSE (IGCSE) Biology — 4BI1 (Papers 1 & 2)
Edexcel International GCSE (IGCSE) Chemistry — 4CH1 (Papers 1 & 2)

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4CH1

Edexcel International GCSE (IGCSE) Chemistry — Complete Notes

Full specification coverage of Papers 1 and 2 — worked calculations, all required practicals, named traps, mnemonics and quizzes. Suitable for linear and modular routes.

$25

Get this book — $25

Format:: eBook — phone, tablet and computer
Access:: online, straight after purchase
Updates:: revised when the specification changes

Edexcel IGCSE Chemistry classified and fully solved past papers 2019 to 2026, Paper 1 and Paper 2

OPTIONAL SOLVED PAST PAPERS

Want every Edexcel Chemistry past paper worked out?

The eBook is a complete standalone revision resource.

The Fully Solved Past Papers pack works through Edexcel International GCSE (IGCSE) Chemistry Papers 1 and 2 (2019–2026) — full mark-scheme-aligned solutions plus classified past papers by topic, so you can practise the exact way marks are awarded.

Fully solved Papers 1 & 2
Classified by topic
Covers 2019–2026 questions
Two years of access

Get the Chemistry Solved Past Papers

Your eBook remains a complete resource. The solved past papers are an optional extra practice pack.

One complete system for independent Chemistry revision

This eBook combines specification-mapped notes, exam-ready definitions, worked calculations, practical methods, Paper 1 and Paper 2 tags, quizzes, flashcards and a progress tracker. A guided Edexcel Chemistry course is not yet available; we will not send you to a Cambridge course.

Edexcel & IGCSE Chemistry students

What Chemistry students report

IGCSE Chemistry

“Every answer matches exactly what the mark scheme asks for. No extra detail, no wasted sentences. My Chemistry grade jumped a full grade after using them.”

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IGCSE Chemistry

“The eBook gave me a 400-page textbook in a fraction of the pages — and every single point was something the mark scheme actually awards.”

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“I stopped losing marks for vague wording. The notes showed me the precise terms the mark scheme expects.”

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“I used to write too much and still miss the key point. Now I know the shortest complete answer that earns the mark.”

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“The phrasing made a real difference for explain questions. I knew which link in the chain had to be stated to earn the next mark.”

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Hosni, the science author and examiner who writes the Chem-Bio eBooks

Written by Hosni

Edexcel International GCSE (IGCSE) Chemistry is taught in these books by the same teacher who wrote them: 21+ years teaching these exact syllabuses, 9 years writing the books, 5 published textbooks — and 20,000+ copies sold yearly across 40+ countries.

Before you choose

Edexcel International GCSE (IGCSE) Chemistry questions

The latest Edexcel International GCSE (IGCSE) Chemistry specification, 4CH1, mapped point by point and tagged to Paper 1 and Paper 2. It is suitable for both the linear and modular routes.

Yes. Moles, concentration, yield and electrolysis problems are solved step by step, with units carried through every line.

Yes. Every required practical is explained with method, expected results and mark-scheme wording.

It is available now. Buy the Chemistry book on its own for $25, or the Biology + Chemistry bundle for $40, with instant access on any device.

Yes — matched to the current 4CH1 specification and revised whenever Edexcel changes it.

The book supports both the linear route, subject code 4CH1, and the modular route, qualification cash-in code 4XCH1. The relevant complete subject code, paper route or modular unit code is displayed within the book so students can identify exactly which content applies to their examination entry.

Yes. The modular route is clearly divided into Chemistry Unit 1, code 4WCH1/1C, and Chemistry Unit 2, code 4WCH2/1C. Displaying these codes helps students revise the correct unit and helps parents confirm that the purchased resource matches the school's examination route.

Yes. The modular and linear routes cover the same overall subject knowledge and skills, although the examinations are organised differently. The book identifies the relevant route, full subject code and unit code so students can navigate the material according to the structure used by their school.

Linear students can follow the full 4CH1 subject structure and prepare for both papers taken at the end of the course. Paper 2 depth and higher-demand content are identified clearly to make final revision easier to plan.

Modular students can revise by Unit 1 and Unit 2 using the displayed 4WCH1/1C and 4WCH2/1C codes. This allows them to focus on the unit being examined next while understanding how both units combine for the complete 4XCH1 qualification.

Examiners may require a precise definition, observation, equation, condition or explanation. The book highlights the difference between an answer that is scientifically reasonable and one that contains the exact points needed by the Edexcel mark scheme.

Yes. Calculations are developed line by line, showing the formula, substitution, rearrangement, units and final answer. The aim is to give students a dependable method they can repeat rather than a collection of answers that only work for one question.

The book supports major quantitative areas such as moles, concentration, titrations, percentage yield, energy calculations, Q = mcΔT and bond energies. Methods are linked to typical examination wording and common errors.

Required practical work is explained through apparatus, variables, quantities, safety, observations, results and conclusions. Students learn what makes a method complete and how practical knowledge may be tested in a written examination.

Yes. The notes distinguish observations from explanations. Students learn when to describe a colour change, precipitate, gas or temperature change and when they must explain the particles, ions or reactions responsible.

Yes. Paper 2 material is tagged so linear students can find the additional content quickly. This is particularly useful when a student is revising for one paper or trying to identify why a Paper 2 question feels unfamiliar.

Reactions, periodic trends, tests, conditions and comparisons are organised into focused lists and tables. This allows students to compare related ideas on one page instead of extracting individual facts from several long textbook sections.

Selected topics include concise mnemonics and “Hosni Says” reminders. These are used for facts that students commonly confuse, while the main explanations still develop the scientific understanding needed for unfamiliar questions.

They should review the chapter summary, test themselves using the available quizzes or flashcards and then apply the content to examination questions. Any mistake can then be linked to a particular fact, calculation step, practical detail or examination trap.

Access is available for two years from the date of purchase. Students can use the resource during the course, across modular or linear examination preparation and throughout their final revision period. ---