b) State with reasons the most suitable methods for collecting each
gases.
i) Oxygen (imk) ii) Hydrogen (mk)
Carbon (IV) Oxide
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OXYGEN-To make oxygen in the laboratory, hydrogen peroxide is poured into a conical flask containing some manganese(IV) oxide. The gas produced is collected in an upside-down gas jar filled with water. As the oxygen
collects in the top of the gas jar, it pushes the water out.
HYDROGEN-Collect the hydrogen gas by inverting a water-filled tube or jar over the wire producing the hydrogen gas. The reason you want water in the container is so you can collect hydrogen without obtaining air.
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