S2 Chemistry: Methods of Collecting Gases

These Senior 2 Chemistry notes by Katenta Joseph of Trinity College Nabbingo explain how gas density and solubility in water influence the choice of collection method. They cover upward delivery, downward delivery, collection over water and collection using a gas syringe. Labelled diagrams illustrate the apparatus, while examples connect gases to collection methods. The final section lists advantages of gas syringes, including measuring collected gas volume over time. The notes contain a factual error in the upward delivery examples: oxygen is incorrectly included among gases less dense than air.