How is ozone prepared from oxygen ? Explain its reaction with
KI

Explanation

Preparation of Ozone :
A slow dry stream of oxygen under silent electric discharge to form ozone (about `10%`) The product obtained is known as ozonised oxygen.
`3O_(2)to2O_(3) DeltaH^(@)=142"kJ"//"mole"`
`to` The formation of ozone is an endothermic reaction.
`to` It is necessary to use silent electric discharge in the preparation of `O_(3)` to prevent its de composition
Reaction with KI : moist KI is oxidised to Iodine in presence of ozone.
`2KI+H_(2)O+O_(3)to2KOH+I_(2)+O_(2)`