Advertisements
Advertisements
Question
How is O3 estimated quantitatively?
Solution
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.
`2I^(-) + H_2O + O_3 -> 2OH^(-) + I_2 + O_2`
Iodide Ozone Iodine
`I_2 + 2Na_2S_2O_3 -> Na_2S_4O_6 + 2 Nal`
Sodium thiosulphate Sodium tetrathionate
APPEARS IN
RELATED QUESTIONS
Account for the following :
Ozone is thermodynamically unstable.
How the supersonic jet aeroplanes are responsible for the depletion of ozone layers?
Why does O3 act as a powerful oxidising agent?
Which aerosols deplete ozone?
Give balanced equation for the following reaction:
Ozone is treated with potassium iodide solution.
Write a balanced chemical equation for the following reaction:
Ozone and lead sulphide.
Explain why:
(1) Fluorine has a lower electron affinity than chlorine.
(2) Red phosphorus is less reactive than white phosphorus.
(3) Ozone acts as a powerful oxidising agent.
Give a reason for the following :
Ozone is thermodynamically less stable than oxygen.
Give reasons for the following:
Ozone is thermodynamically less stable than oxygen.
Ozone is a/an _______ molecule and the two O-O bond lengths in ozone are (i) _______-and (ii) _________.
Which of the following is the wrong statement?
Ozone on reacting with KI in a neutral medium produces ______.
What is ozone umbrella?
Write a note on ozone depletion.
