p-Block elementsHard
Question
Estimation of ozone can be made quantitatively by :
Options
A.decomposition into O2 and absorption of O2 into pyrogallol
B.volumetric method using KI and titration of the liberated iodine using hypo solution
C.oxidative ozonolysis method
D.all methods given above
Solution
2KI + H2O + O3 → 2KOH + O2 + I2
2S2O32- + I2 → S4O62- + 2I-
1mole of O3 = 1 mole of I2 = 2 mole of S2O32-
2S2O32- + I2 → S4O62- + 2I-
1mole of O3 = 1 mole of I2 = 2 mole of S2O32-
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