Gas Tests 19 November 2018.

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Presentation transcript:

Gas Tests 19 November 2018

Name as many gases as you can

Three Common Gases: The three most common gases given off in reactions are: Oxygen Hydrogen Carbon dioxide All these gases are colorless and odourless. There are tests we can do to establish which gas is given off in an experiment.

To test for Carbon dioxide Use Lime water (Calcium Hydroxide) When Carbon dioxide is bubbled through lime water, the lime water becomes cloudy. A precipitate is formed.

To test for Hydrogen Magnesium will react with acid and hydrogen gas is given off. If this gas is collected and ignited it will explode making a squeaky pop!

To test for Oxygen Oxygen will relight a glowing splint. There are a number of ways of producing oxygen in the lab.

Produce a display poster for the 3 gas tests Must be clear with a diagram and key terms Carbon dioxide: Limewater, cloudy Hydrogen: Ignition, squeaky pop Oxygen: relights glowing splint