Question

How is O 3 estimated quantitatively?

Answer 1

One of the methods of estimation of ozone is by iodometric method.Here ozone is allowed to react with KI.Ozone being an oxidising agent oxidises KI to iodine.The liberated iodine is reacted with sodium thiosulphate solution.From the amount of thiosulphate solution consumed in the reaction estimations are then done.

Answer 2

when ozone reacts with an excess of potassium iodide solution buffered with a borate buffer (pH 9.2), iodine is liberated which can be titrated against a standard solution of sodium thiosulphate . This is a quantitative method for estimating O3 gas