Preparation in laboratory
Oxygen preparation
Preparation in laboratory
Preparation in industry
1. Decomposition of oxygen rich unstable compounds:
KСlО3 = 2KСl + 3О2 (catalysts МnO2, Fе2О3, Сr2О3)
(Berthollet's Salt)
2KМnО4 = K2МnО4 + МnО2 + О2
2KNО3 = 2KNО2 + О2
2HgО = 2Hg + О2
2H2O2 = 2H2O + O2 ( catalyst МnO2)
2. Interaction of МnО2 and concentrated H2SO4:
2МnО2 + 2H2SO4 = 2МnSО4 + O2 +2H2O
3. Interaction of peroxides and superoxides with water (carbon dioxide):
4KO2 + 2H2O = 4KOH+ 3O2
2Na2O2 + 2CO2 = 2Na2CO3 + O2
4. The former industrial(till 1911) A. Breenmethodconsists of two steps:
a) heating (300°С) of ВаО together with O2
2ВаО + О2 = 2ВаО2
b) ВаО2 further thermal decomposition (at 800 °С)
2ВаО2 = 2ВаО + О2
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