Ozone acts as an oxidising agent and a reducing agent. Explain with e

1.	Ozone acts as an oxidising agent and a reducing agent. Explain with examples.
Answer» (A) Ozone as an oxidising agent : Since ozone decomposes to liberate nascent oxygen, it is a powerful oxidising agent next to fluorine. O_3(g) → O_2(g) + O For example : It oxidises lead sulphide (PbS) to lead sulphate (PbSO₄) changing the oxidation state of S from – 2 to +6. PbS_(s) + 4O_3(g) → PbSO_(s) + 4O_2(g) Potassium iodide, KI is oxidised to iodine, I₃ in the solution. 2KI_(aq) + H₃O_(I) + O_3(g) → 2KOH_(aq) + I_2(s) + O_2(g) Ozone oxidises nitrogen oxide to nitrogen dioxide. NO_(g) + O_3(g) → NO_2(g) + O_2(g) (B) Ozone as a reducing agent : Ozone reduces peroxides (O^1-) to oxides (O^2-). Ozone reduces barium peroxide,BaO₂ to barium oxide, BaO. Ozone reduces hydrogen peroxide,H₂O₂ to water, H₂O. H₂O₂ + O₃ → H₂O + 2O₂

Ozone acts as an oxidising agent and a reducing agent. Explain with examples.

Answer»

(A) Ozone as an oxidising agent : Since ozone decomposes to liberate nascent oxygen, it is a powerful oxidising agent next to fluorine.

O_3(g) → O_2(g) + O

For example :

It oxidises lead sulphide (PbS) to lead sulphate (PbSO₄) changing the oxidation state of S from – 2 to +6.

PbS_(s) + 4O_3(g) → PbSO_(s) + 4O_2(g)

Potassium iodide, KI is oxidised to iodine, I₃ in the solution.

2KI_(aq) + H₃O_(I) + O_3(g) → 2KOH_(aq) + I_2(s) + O_2(g)

Ozone oxidises nitrogen oxide to nitrogen dioxide.

NO_(g) + O_3(g) → NO_2(g) + O_2(g)

(B) Ozone as a reducing agent : Ozone reduces peroxides (O^1-) to oxides (O^2-).

Ozone reduces barium peroxide,BaO₂ to barium oxide, BaO.

Ozone reduces hydrogen peroxide,H₂O₂ to water, H₂O.

H₂O₂ + O₃ → H₂O + 2O₂