Gas Tests
Identification workflows and observation language for standard gas tests used in practical chemistry.
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
- 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.
- Ammonia and Ammonium Salts
Ammonia and ammonium ions: the damp-red-litmus gas test, the ammonium-ion test and the balanced ionic equations.
- Qualitative Analysis (QA)
Qualitative analysis hub: observation-to-inference method, ion and gas tests, key reagents and exam wording. Practise the topic with its check.
- Qualitative Analysis: Gas Tests
The six K324 / 6092 gas tests for ammonia, carbon dioxide, chlorine, hydrogen, oxygen and sulfur dioxide, with exact observations and equations.
- Sulfur Dioxide and Sulfuric Acid
Sulfur dioxide: its acidified potassium manganate(VII) test, acid-rain effects, flue-gas removal and dilute sulfuric acid links.
- K324 / 6092 Paper 3 Practical Checklist
Night-before and exam-day K324 / 6092 Paper 3 checklist covering practical writing, QA, titration, tables and graphs.
- Collecting gases and measuring their volumes
Choose gas collection apparatus from the task, water solubility and density, and measure gas volume without losing the product.
- Measurements & Experimental Techniques
Chemistry experimental techniques hub: measurement, gas collection, purity, and separation. Includes Paper 3 skill lessons, exam traps, and quizzes.
- G3 Pure and O-Level Chemistry Practical (Paper 3)
Chemistry Paper 3 practical hub: planning, measurements, tables/graphs, titration, evaluation, and qualitative analysis. Practise the topic with its check.
- Practical Skills & Qualitative Analysis (A Level)
A Level Paper 4 practical skills and qualitative analysis notes: planning, tables/graphs/uncertainty, titration technique, and key cation/anion/gas tests.
- Qualitative Analysis: Anions and Gases (A Level)
Paper 4-ready anion and gas tests: carbonates, sulfates, halides, nitrates, ammonia, carbon dioxide, chlorine, and sulfur dioxide.
- Qualitative Analysis Notes (A Level)
One-page Paper 4 qualitative analysis notes: how to write observations, key ions and gases, and the phrasing examiners expect.