BRAINCAKEHalogen Disproportionation Reactions
Disproportionation is a redox reaction in which the same element is both oxidised and reduced. Two examples are the reaction of chlorine with water and the reaction of chlorine and cold, dilute aqueous sodium hydroxide.
Cl2(aq) + H2(l) → HClO(aq) + HCl(aq)
The oxidation state of chlorine is +1 in HClO and -1 in HCl.
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Key terms in this lesson
- Acid
- A proton donor; a substance that releases hydrogen ions when dissolved in water.
- 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 involved in an atom's bonding to another element.
More in Reactivity Trends
- Uses of Group 2 Compounds
- Group 7 Halogens Trends in Boiling Points
- Group 7 Redox Reactions and Reactivity
- Halogen-Halide Displacement Reactions
- Uses of Halogens
- Test for Halide Ions
- Test for Anions
- Test for Ammonium Ions
All 16 lessons in Reactivity Trends · All OCR AS-level Chemistry topics