- Definition of O2
Oxygen or O2 is an essential chemical element in life. O2 is the abbreviation for oxygen gas, a molecular form of oxygen that consists of two oxygen atoms bonded together. Oxygen usually appears as a colorless, odorless, and tasteless gas.
1.1 Names
1.1.1 Common name: Oxygen, Oxygen Gas
1.1.2 English name: Oxygen
1.2 Atomic mass: 16
1.3 Atomic weight: 15.999
1.3.1 Molecular structure: 2 oxygen atoms bonded together.
1.4 Ion structure: O2- (superoxide ion), O2 (peroxide ion).
- Properties of O2
2.1 Physical properties of O2
State: gas
Color: colorless
Odor: odorless
PH level: not applicable (not a liquid)
2.2 Chemical properties of O2: Oxygen reacts strongly with metals and nonmetals to form oxides. Oxygen can also dissolve in water.
- Common chemical equations with O2
3.1 Reaction of Metals with O2: 2Mg + O2 -> 2MgO(Mgisthemetalmagnesium)
3.2 Acid reaction with O2: usually no direct reaction
3.3 Nonmetal reaction with O2: C + O2 -> CO2
3.4 Reaction with salts: no direct reaction
- Synthesis of O2
4.1 Laboratory synthesis of O2: usually synthesized by chemical decomposition reaction, such as the decomposition reaction of hydrogen peroxide HO2H into water and oxygen: 2HO2H → 2H2O + O2 ->
4.2 Industrial synthesis of O2: usually synthesized by gas separation method by cooling the air until it turns into a liquid, then separating O2.