In this I/GCSE Chemistry blog post, we will be understanding how oxygen reacts to different elements and substances, as well as how to carry out these experiments.
Let's go!
Oxygen in reactions
You can make oxygen by using hydrogen peroxide, as it will decompose into water and oxygen :
2H2O2 - 2H2O + O2.
- This reaction is really slow but it can be increased by addin manganese oxide (catalyst).
- You can collect the oxygen that's produced over water or by using a gas syringe
Collecting over water: using a delivery tube to bubble the gas into an upside down measuring cylinder or a gas syringe.
- When you burn something it reacts with oxygen in the air to form an oxide which can have acidic or basic character.
Magnesium: burns with a bright white flame in air and the white powder is magnesium oxide. It is slightly alkaline.
2Mg + O2 ->2MgO
Carbon: it will burn if its very strongly heated, orangey yellows flame and produces carbon dioxide. It is acidic:
C + O -> CO2
Sulfur: burns with a pale blue flame and produces sulfur dioxide, it is slightly acidic.
S+ O2 ->SO2
That's all!
References:
https://www.google.com/url?sa=i&url=https%3A%2F%2Fwww.bbc.co.uk%2Fbitesize%2Fguides%2Fzrfmrj6%2Frevision%2F2&psig=AOvVaw2ANe10aPcMXLqi9EzC1Tb9&ust=1627956100227000&source=images&cd=vfe&ved=0CAsQjRxqFwoTCIDYjJyfkfICFQAAAAAdAAAAABAK
https://www.google.com/url?sa=i&url=https%3A%2F%2Fwww.flickr.com%2Fphotos%2F37388341%40N00%2F1497144298&psig=AOvVaw2aRerK7IHGgfdkVatsZXZf&ust=1627956240696000&source=images&cd=vfe&ved=0CAsQjRxqFwoTCKCZid-fkfICFQAAAAAdAAAAABAJ
https://www.google.com/url?sa=i&url=https%3A%2F%2Fwww.thoughtco.com%2Fmaking-water-from-hydrogen-and-oxygen-4021101&psig=AOvVaw04xEp1U3FPnxOYHhOIibiQ&ust=1627956283343000&source=images&cd=vfe&ved=0CAsQjRxqFwoTCPCmm_WfkfICFQAAAAAdAAAAABAD
Drafted by Venetia (Chemistry)