Environmental Chemistry Lab

Ozone Lab

Contents

1. Absorption of light

2. Absorption of UV by Ozone

3. Oxidizing Power of Ozone

4. Absorption Spectrum of Ozone

Exp. 1: Absorption of UV

Apparatus: Tonic water, plastic cups, UV source, black paper

Exp. 1: Absorption of UV

The upper quarter-inch of the tonic water cup "glows" blue

Exp. 2: Absorption of UV by Ozone

Apparatus: O3 generator, glass tube, fluorescent screen, UV light

Exp. 2: O3 Absorption of UV

Ozone absorbs UV to produce a shadow

Exp. 3: Oxidizing Power of Ozone

Apparatus: O3 generator, KI, chlorine water, bleach, 3% H2O2, food coloring

Exp. 4: UV Spectrum of Ozone

Apparatus: Spectrophotometer (200-400 nm), gas cell

Exp. 4: UV Spectrum of Ozone

Ozone absorbs strongly in the UV region

References

• Daniel, D.W. (1994) A Simple UV Experiment of Environmental Significance. Journal of Chemical Education, Vol. 71, No. 1, pp. 83.

• Ondrus, M.G. (1996) Environmental Chemistry: Experiments and Demonstrations, 2nd Ed. Wuertz Publishing Ltd., Winnepeg.