Hydrogen peroxide will decompose to form oxygen and water. However, this process is very slow so manganese (IV) oxide is added to speed up the decomposition (this acts as a catalyst). The oxygen produced can be collected in two ways...
1. Over water...
- connect a delivery tube to bubble the gas into an upside-down measuring cylinder in a beaker/bowl full of water.
2. In a gas syringe...
- you can use a gas syringe to collect pretty much any gas... just connect it to the flask that the hydrogen peroxide is decomposing in.
NOTE: the equation for this reaction is 2H2O2 (aq) ---> 2H2O (l) + O2 (g)
A blog covering and explaining the Edexcel IGCSE Chemistry specification for the 2016 summer exams. If you are doing just double science, you do not need to learn the stuff for paper two, if you are doing triple you will need to learn all (GOOD LUCK!) I have separated the papers to make files easier to find. Hope it helps :)
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