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The amount ozone in a gas mixture may be...

The amount ozone in a gas mixture may be determined by passing the gas into a `"_____"` solution buffered with a borate buffer (pH 9.2).

A

`KI_(3)`

B

`KIO_(3)`

C

`KI`

D

`KIO_(4)`

Text Solution

Verified by Experts

The correct Answer is:
3
When ozone reacts with an excess of potassium iodide solution buffered with a borate buffer (`pH9.2)`, iodine is liberated which can be titrated against a standard solution of sodium thiosulphate:
`O_(3)+2K^(+)+2I^(-)+H_(2)O rarr I_(2)+2KOH+O_(2)`
This is a quantitative method for estimating `O_(3)` gas.
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The pH of an acidic buffer mixture is:

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