Reactions of Halide Ions
- A disproportionation reaction is a reaction in which the same species is both oxidised and reduced
- The reaction of chlorine with dilute alkali is an example of a disproportionation reaction
- In these reactions, the chlorine gets oxidised and reduced at the same time
- Different reactions take place at different temperatures of the dilute alkali
Chlorine in cold alkali (15 oC)
- The reaction that takes place is:
- The ionic equation is:
- The ionic equation shows that the chlorine gets both oxidised and reduced
- Chlorine gets oxidised as there is an increase in ox. no. from 0 to +1 in ClO-(aq)
- The half-equation for the oxidation reaction is:
- Chlorine gets reduced as there is a decrease in ox. no. from 0 to -1 in Cl-(aq)
- The half-equation for the reduction reaction is: