Comparison of allotropic modifications of oxygen (oxygen and ozone)

Comparison criteria Oxygen O2 Ozone O3
Common signs
1. Physical properties Gases under normal conditions
2. Belonging to a certain class of substances Simple substances that are formed by the same element – oxygen, that is, are its allotropic modifications
3. Chemical properties Strong oxidants
Signs of difference
1. Physical properties Gas is colorless and odorless, liquid – has a blue color, solid – blue crystals. Let’s slightly dissolve in water. Does not block ultraviolet rays Blue gas with a pungent odor. It dissolves in water 10 times better than oxygen. Retards ultraviolet rays
2. Biological properties Not poisonous. Not bacteriocidal. A substance necessary for the respiration of aerobic organisms Severely irritating to eyes and respiratory tract. Poisonous in high concentrations. Bacteriociden
3. Chemical properties Strong oxidizing agent. Interacts with all metals except platinum, and non-metals, except for halogens (their compounds are obtained indirectly). Reacts with complex substances, forming, as a rule, oxides of those elements from which the complex substance is built An even stronger oxidizing agent than oxygen, so reactions involving ozone proceed at high rates. More vigorously oxidizes almost all simple substances (including Au and Pt) and many complex substances
4. Being in nature In air: 21% by volume and 23.15% by mass. Dissolved in water, part of the soil Content in the air: in summer – up to 7 · 10-9% (by volume), in winter – up to 2 · 10-10%.

In the atmosphere, the maximum concentration is at an altitude of 20-25 km, where ozone forms a layer that protects the Earth from UV radiation

5. Receiving Fractional distillation of liquid air and electrolysis of water in the presence of NaOH or H2SO4 Under the influence of electrical discharges or UV radiation on air oxygen
6. Application A substance required for breathing and burning Water disinfection, tissue bleaching, food deodorization
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