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Ozone

Estimation of...

Question

Estimation of ozone can be made quantitatively by :

A

decomposition into

O_{2}

and adsorption of

O_{2}

into pyrogallol.

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B

volumetric method using

K I

and titration of the liberated iodine using hypo solution.

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C

oxidation ozonolysis method.

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D

all of the above.

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Solution

The correct option is B volumetric method using $K I$ and titration of the liberated iodine using hypo solution.
Below are the reactions that take place in volumetric method for estimation of ozone using $K I$ . The liberated $I_{2}$ is titrated using $S_{2} O_{3}^{2 -}$ solution.
$\begin{matrix} 2 K I (n e u t r a l) + O_{3} + 2 H C l ⟶ I_{2} + 2 K O H      K I + K O I + O_{2} K I + K O I + 2 H C l ⟶ 2 K C I + I_{2} + H_{2} O I_{2} + 2 S_{2} O_{3}^{2 -} ⟶ S_{4} O_{6}^{2 -} + 2 I \end{matrix} ⎫ ⎪ ⎪ ⎪ ⎪ ⎬ ⎪ ⎪ ⎪ ⎪ ⎭ O_{3}$ estimated by this reaction

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Similar questions

Q. An aqueous solution of

K I O_{3}

K I

on mixing undergoes redox process to give

I_{2}

. The reaction occurs quantitatively and can be used to estimate the conc. of

K I O_{3}

. The iodine liberated in the reaction can be estimated by using hypo solution and starch as indicator.

x

K I O_{3}

react completely with

y

K I

, then which of the following are correct?

One litre of a mixture of

O_{2}

O_{3}

N T P

was allowed to react with an excess of acidified solution of

K I

. The iodine liberated required

40

\frac{M}{10}

sodium thiosulphate solution for titration. Ultraviolet radiation of wavelength

300

nm can decompose ozone. Assuming that one photon can decompose one ozone molecule.

How many photons would have been required for the complete decomposition of ozone in the original mixture?

x

{X e F}_{4}

quantitatively oxidized KI to

I_{2}

X e

, along with formation of

K F

. This iodine required 20 ml of decinormal hypo solution for exact titration. The value of

x

O n e l i t r e

of a mixture of

O_{2}

O_{3}

at NTP was allowed to react with an excess of an acidified solution of

K I

. The iodine liberated required

40 m L

M / 10

sodium thiosulphate solution for titration. What is the weight percent of the ozone in the mixture? Ultraviolet radiation of wavelength

300 n m

can decompose ozone. Assuming that one photon can decompose one ozone molecule, how many photons would have been required for the complete decomposition of ozone in the original mixture?

One litre of a mixture of

O_{2}

O_{3}

N T P

was allowed to react with an excess of an acidified solution of

K I

. The iodine liberated required

40

\frac{M}{10}

sodium thiosulphate solution for titration. Ultraviolet radiation of wavelength

300

nm can decompose ozone. Assuming that one photon can decompose one ozone molecule.

What is the total amount of

O_{2}

O_{3}

1 ℓ

of the mixture at STP?

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