Neutralisation
Core acid-base logic spanning pH, indicator interpretation, salt formation, and reaction equations.
This route helps when you keep missing the same type of question across different topics. Use it to combine lesson notes with linked practice and tools in one place.
Notes and Hubs in This Route
- Introduction to Acids
Acids: aqueous hydrogen ions, complete versus partial ionisation, and the distinction between acid strength and concentration.
- Acids, Bases & Salts
Acids, bases and salts hub: aqueous ions, pH, core reactions, solubility rules, salt preparation, ammonia and exam practice.
- Writing ionic equations
Ionic equations: split aqueous ions, cancel spectator ions, and balance atoms and charge for common precipitation, neutralisation, and gas reactions.
- Introduction to Bases
Bases and alkalis: definitions, aqueous hydroxide ions, neutralisation and the ammonium-ion reaction.
- Oxides
Oxides: classify acidic/basic/amphoteric/neutral, and write the key reactions and equations examiners expect.
- pH Scale & Indicators
pH scale & indicators: acidic/neutral/alkaline ranges, key colour changes (litmus/universal indicator), and how to answer exam-style questions.
- Physical & Chemical Properties of Acids
Acid properties and reactions: indicator behaviour, and the 3 core reactions with metals, bases and carbonates—plus key observations and gas tests.
- Physical & Chemical Properties of Alkalis
Alkali properties and reactions: pH > 7 and red litmus → blue, neutralisation, ammonium salts test (ammonia), and precipitate formation.
- Preparing Soluble Salts
Prepare soluble salts using excess insoluble solid or titration, then separate and crystallise the product. Explain how each step protects purity.
- Ammonia and Ammonium Salts
Ammonia and ammonium ions: the damp-red-litmus gas test, the ammonium-ion test and the balanced ionic equations.
- Salts
Salts: definitions, formulae, solubility rules, precipitate prediction and selecting excess-solid, titration or precipitation methods.
- Sulfur Dioxide and Sulfuric Acid
Sulfur dioxide: its acidified potassium manganate(VII) test, acid-rain effects, flue-gas removal and dilute sulfuric acid links.