For estimating ozone in the air, a ceratinvolume of air is passedthrough an acidified or neutralKI solutionwhen oxygen is evolved and iodide is oxidisedto give iodine. When such a solution is acidified, free iodine is evolved which can be be titrated with standard Na_(2)S_(2)O_(3) solution. In an experiment 10 litre of air at1 atmand 27^(@)C were passed through an alkaline KI solution, at the end, the iodine entrapped in a solution on titration as above required 1.5mL of 0.01N Na_(2) S_(2) O_(3) solution. Calculate volume % foO_(3) in sample.

For estimating ozone in the air, a ceratinvolume of air is passedthrou

1.	For estimating ozone in the air, a ceratinvolume of air is passedthrough an acidified or neutralKI solutionwhen oxygen is evolved and iodide is oxidisedto give iodine. When such a solution is acidified, free iodine is evolved which can be be titrated with standard Na_(2)S_(2)O_(3) solution. In an experiment 10 litre of air at1 atmand 27^(@)C were passed through an alkaline KI solution, at the end, the iodine entrapped in a solution on titration as above required 1.5mL of 0.01N Na_(2) S_(2) O_(3) solution. Calculate volume % foO_(3) in sample.
Answer» ANSWER :`1.847x10^(-3)%`