Make Your Own Ozone Detector
You can make ozone test strips to detect and monitor ozone levels in your own backyard or around your school.
You will need: - corn starch filter paper
- potassium iodide
Basically, you make a paste from water, corn starch and potassium-iodide, and you paint this paste on strips of filter paper. You then expose the strips to the air for eight hours. Ozone in the air will react with the potassium iodide to change the color of the strip. The ozone concentration is indicated by the 'purple color.
2KI + 03 + H2O --> 2KOH + O2 + I