How is O3 estimated quantitatively?
Answer
Quantitatively, ozone can be estimated with the help of potassium iodide. When ozone is made to react with potassium iodide solution buffered with a borate buffer (pH 9.2), iodine is liberated. This liberated iodine can be titrated against a
standard solution of sodium thiosulphate using starch as an indicator.
The reactions involved in the process are given below.
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