(1) magnesium+oxygen->; magnesium oxide
light
(2) iron+oxygen->; ferroferric oxide
hot
(3) copper+oxygen->; copper oxide
light
(4) aluminum+oxygen->; aluminium oxide
light
(5) hydrogen, aluminum and oxygen->; water
light
(6) red phosphorus+oxygen->; phosphorus pentoxide
light
(7) sulfur+oxygen->; sulphur dioxide
light
(8) carbon+oxygen->; carbon dioxide
light
(9) carbon+oxygen->; carbon monoxide
light
(10) carbon oxide+oxygen->; carbon dioxide
light
(1 1) methane+oxygen->; Carbon dioxide+water
light
(12) alcohol+oxygen->; Carbon dioxide+water
light
(13) mercury+oxygen->; mercuric oxide
light
(14) potassium permanganate->; Oxygen+potassium permanganate+manganese dioxide
manganese dioxide
(15) hydrogen peroxide->; Primary chemical equation of oxygen+water 1. The nature of oxygen;
(1) Reaction of simple substance with oxygen: (combination reaction)
1. Magnesium burns in air: 2Mg+O2 ignites 2MgO.
2. Iron burns in oxygen: 3Fe+2O2 ignites Fe3O4.
3. Copper heating in air: 2Cu+O2 heating 2CuO.
4. Aluminum burns in air: 4Al+3O2 ignites 2Al2O3.
5. Combustion in hydrogen and air: 2H2+O2 ignites 2H2O.
6. Red phosphorus burns in air (experiment to study air composition): 4P+5O2 ignites 2P2O5.
7. Sulfur powder burns in air: S+O2 ignites SO2.
8. Complete combustion of carbon in oxygen: C+O2 ignites CO2.
9. Incomplete combustion of carbon in oxygen: 2C+O2 ignites 2CO.
(2) the reaction of compounds with oxygen:
10. Carbon monoxide burns in oxygen: 2CO+O2 ignites 2CO2.
1 1. Methane burns in air: CH4+2O2 ignites CO2+2H2O.
12. Alcohol burns in air: C2H5OH+3O2 ignites 2CO2+3H2O.
(3) Oxygen source:
13. Boyle studies the composition of air experiment 2HgO heating Hg+O2 =
14. heating potassium permanganate: 2KMnO4 heating k2mno4+MnO2+O2 = (principle of oxygen production in laboratory 1)
15. decomposition reaction of hydrogen peroxide with manganese dioxide as catalyst: H2O2, MnO, 22h2o+O2 = (principle of oxygen production in laboratory 2)
Second, the water in nature:
16. Decomposition of water under the action of direct current (experimental study on composition of water): 2H2O electrified 2H2 =+O2 =
17. quicklime is soluble in water: CaO+H2O == Ca(OH)2.
18. Carbon dioxide is soluble in water: H2O+CO2==H2CO3.
Third, the law of conservation of mass:
19. Magnesium burns in air: 2Mg+O2 ignites 2MgO.
20. The reaction between iron and copper sulfate solution: Fe+CuSO4 = = FeSO4+Cu.
2 1. Reduction of copper oxide by hydrogen: H2+ copper oxide heats copper +H2O.
22. Magnesium reduces copper oxide: magnesium+copper oxide heats copper+magnesium oxide. That's all for junior high school. It's simple.