BRAINCAKESuperoxide
When potassium is heated with oxygen a white solid K2O and an orange-yellow compound KO2 are formed. In the superoxide ion each oxygen has an oxidation number of -½.
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Key terms in this lesson
- Oxidation
- The addition of oxygen, the removal of hydrogen, the loss of electrons, or an increase in oxidation number.
- Oxidation number
- A number that represents the number of electrons an atom has lost or gained, or would do if the compound were fully ionic.
More in Oxidation and Reduction
- Oxidising and Reducing Agents
- Oxidation State
- Rules for Oxidation State
- Working Out Oxidation States
- Redox Equations
- Redox Reactions in Aqueous Solutions
- Thermite Reaction
- Half Equations from Ionic Equations
All 15 lessons in Oxidation and Reduction · All AQA AS-level Chemistry topics