1. What You Should Know About Ozone By Szymon Poręba from Poland

2. O 3 zone is an allotropic form of O 2 xygen Ozone (O 3 ) trioxygen, is a triatomic molecule, consisting of three oxygen atoms. http://en.wikipedia.org/wiki/File:Ozone-CRC-MW-3D-vdW.png

3. Properties Pale blue gas, it smells like air after a thunderstorm or chlorine from a swimming pool (density 2.144 g/L) slightly soluble in water and much more soluble in inert non-polar solvents such as CCl 4 or fluorocarbons, where it forms blue solution 112 °C, it condenses to form dark blue liquid It is dangerous to allow the liquid to warm to its boiling point, because both concentrated gaseous ozone and liquid ozone can detonate. At temperatures below –193 °C, it forms violet-black solid

4. Properties continued Most people can detect about 0.01 μmol/mol of ozone in the air where it has a very specific sharp odor resembling chlorine bleach. Exposure of 0.1 to 1 μmol/mol produces headaches, burning eyes, and irritation to the respiratory passages. Even low concentration of ozone in the air are very destructive to organic materials such as latex, plastics, and animal lung tissue.

5. Health effects Air pollution Ozone can harm lung functions and irritate the respiratory system It can cause asthma, heart attack or bronchitis. In high concentration, ozone may cause death because of lungs edema. Why ozone is so dangerous ? Ozone reacts with biological membranes in our bodies, it produces free radicals such as single atom of Oxide [O] reacts with proteins which build human tissues and causes serious damage to them

6. Structure of molecule http://en.wikipedia.org/wiki/File:Ozone-CRC-MW-3D-balls.png

7. Structure Continued Ozone molecule is similar to water molecule The central atom is sp 2 hybrized Dipole moment – 0.53 D – so it is rather weak polarity Angle between bonds - 116.8 O Chemical bond length – 1.278 A

8. Ozone can trap UV It seems that molecules are in permament move Bonds around atoms can oscillate They can rotate, stretch or even twist

9. Ozone can trap UV http://en.wikipedia.org/wiki/File:Asymmetrical_stretching.gif http://en.wikipedia.org/wiki/File:Symmetrical_stretching.gif http://en.wikipedia.org/wiki/File:Scissoring.gif

10. How to produce ozone in a chemical reaction If you mix some crystals of potasium permanganate with a few drops of sulfuric acid you will get ozone gas by decoposion reaction of manganese heptoxide 2 KMnO 4 + 2 H 2 SO 4 → Mn 2 O 7 + H 2 O + 2 KHSO 4 Mn 2 O 7  MnO 2 + O 3 Sources: http:// pl.wikipedia.org/w/index.php?title=Plik:Mangan ese-heptoxide-3D- balls.png&filetimestamp=20070109090319