Ozone an estimated in air by passing certaing volume of air through an acidified or neutral or basic KI solution when `O_(2)` is evolved and `I^(ɵ)` is oxidised to `I_(2)`. Free `I_(2)` evolved is titrated with standard `Na_(2)S_(2)O_(3)` solution. In an experiment 10 L of air at 1 atom and `27^@C` was passed through an alkaline KI solution and `I_(2)` liberated requried 2 " mL of " `(M)/(800)Na_(2)S_(2)O_(3)` solution. Calculate the volume percentage of `O_(3)` in sample.

Explanation

To calculate the volume percentage of ozone (O₃) in the air sample, we will follow a series of steps.

### Step-by-Step Solution:

1. **Write the Balanced Redox Reaction:**
The reaction between ozone and iodide ions in basic medium can be represented as:
\[
2 I^- + O_3 + 2 OH^- \rightarrow O_2 + I_2 + 2 H_2O
...