Topic 5: Separate chemistry 1 – GCSE Edexcel Higher Chemistry revision notes

What this topic covers

Topic 5: Separate chemistry 1 has 7 subtopics, including:

• Use of amount of substance in relation to masses of pure substances
• Properties of transition metals (chemistry only)
• Using materials (chemistry only)
• Yield and atom economy of chemical reactions (chemistry only)
• Using concentrations of solutions in mol/dm 3 (chemistry only) (HT only)
• Use of amount of substance in relation to volumes of gases (chemistry only) (HT only)

Topic 5: Separate chemistry 1 lessons by subtopic

41 lessons, grouped by subtopic.

Use of amount of substance in relation to masses of pure substances

• Introduction to Moles and Avogadro's Constant
• Molar Mass and Converting Between Moles and Mass: Understand that molar mass equals relative formula mass in grams, and practice calculating the number of moles from a given mass and vice versa.
• Understanding Chemical Equations in Terms of Moles
• Calculating Masses from Balanced Chemical Equations
• Converting Masses to Moles for Equation Balancing
• Balancing Equations from Mass Data
• Understanding Limiting Reactants
• Understanding Solution Concentration
• Calculating Mass of Solute in Solutions

Properties of transition metals (chemistry only)

• Properties of Transition Metals vs Group 1 Elements
• Examples of Transition Metal Properties
• Introduction to Transition Metal Properties
• Transition Metal Examples: From Chromium to Copper

Using materials (chemistry only)

• Understanding Corrosion and Rusting Experiments
• Preventing corrosion with barrier methods and electroplating
• Sacrificial Protection and Galvanising
• Common Alloys and Their Properties
• Analysing Alloy Compositions and Applications
• Uses of metals and alloys including magnalium and brass: Compare aluminium, copper, gold, brass, and magnalium and link each use directly to the relevant metal or alloy properties.

Yield and atom economy of chemical reactions (chemistry only)

• Understanding Percentage Yield and Why Reactions Don't Give 100% Yield
• Calculating Percentage Yield and Theoretical Mass
• Understanding Atom Economy
• Calculating and Applying Atom Economy
• Choosing industrial reaction pathways: Compare reaction pathways using yield, atom economy, equilibrium position, reaction rate, and useful by-products.

Using concentrations of solutions in mol/dm 3 (chemistry only) (HT only)

• Understanding Solution Concentration in mol/dm³
• Calculating Moles and Mass from Solution Concentration
• Finding Unknown Concentrations Using Reaction Volumes
• Core practical: acid-alkali titration: Use a burette, pipette, and suitable indicator to carry out an accurate acid-alkali titration.
• Titration calculations for unknown concentration and volume: Use titration results to calculate an unknown concentration or the volume of solution needed in a reacting system.

Use of amount of substance in relation to volumes of gases (chemistry only) (HT only)

• Gas volume fundamentals and molar volume
• Gas volume calculations from balanced equations
• Gas-volume calculations using Avogadro's law: Use Avogadro's law and balanced equations directly when calculating gas volumes in gaseous reactions.

Industrial chemistry: Haber process, fertilisers, and fuel cells

• Introduction to the Haber Process
• Equilibrium and Rate in the Haber Process
• NPK fertilisers and their importance
• Processing phosphate rock to make fertilisers
• Industrial vs laboratory production of fertilisers
• Introduction to Fuel Cells
• Comparing Fuel Cells with Batteries and Half Equations
• How Cells and Batteries Work
• Types of Cells and Batteries

Revise Right Mocks '26

Edexcel GCSE Chemistry mock draft, 26–31 Oct. Draft coverage: Chemistry Paper 1 (Higher tier). Reviewed for an original-practice sitting; check student availability before registering. Marking and results will follow later, after separate approval. Eligible new accounts receive a five-day Pro trial when signup email verification completes. Previous trials keep their original expiry. After expiry, new papers need Pro unless you have an explicitly confirmed free sitting offer for this event. That offer adds no Pro time or AI learning. Saved attempts and released results remain readable. No card or automatic charge.

More in this course

Go back to the full GCSE Edexcel Higher Chemistry topic list, or practise this topic with past-paper questions.