. Elements of modern chemistry . ors, or blue by ammonia. OZONE. 61 phosphorus are introduced into a bottle containing enoughwater to just about half immerse them, and the whole is agi-tated from time to time. In a short time the air in the bottlewill be charged with a small quantity of ozone. According to Schonbein, who observed these facts, ozone isproduced during all slow combustions. Thus, when oil of tur-pentine is exposed to the air under the influence of sunlight,it is slowly oxidized, and in becoming resinified, it becomes atthe same time charged with a small quantity of ozone, whichdi
. Elements of modern chemistry . ors, or blue by ammonia. OZONE. 61 phosphorus are introduced into a bottle containing enoughwater to just about half immerse them, and the whole is agi-tated from time to time. In a short time the air in the bottlewill be charged with a small quantity of ozone. According to Schonbein, who observed these facts, ozone isproduced during all slow combustions. Thus, when oil of tur-pentine is exposed to the air under the influence of sunlight,it is slowly oxidized, and in becoming resinified, it becomes atthe same time charged with a small quantity of ozone, whichdissolves in it. 4. By the decomposition of harium dioxide hy sulphuricacid.—This decomposition gives rise to barium sulphate andoxygen charged with a small quantity of ozone (Houzeau). H^SO* + BaO^ =. BaSO* + H^O + 0 The barium dioxide is introduced in small portions into sul-phuric acid contained in a flask, to the neck of which is fitteda glass stopper pierced for the passage of the delivery-tube,which is ground in (Fig. 21).. Properties of Ozone.—Ozone possesses an intense and pecu-liar odor. Hautefeuille and Chappuis have liquefied it by al-lowing the strongly compressed gas to expand suddenly : theliquid is sky-blue, and the compressed gas has the same color,the tint being deeper as the temperature is lowered or the press-ure increased. At a temperature of 290° it is reconvertedinto ordinary oxygen, the volume of which is greater than thatoccupied by the ozone. It is then certainly condensed has energetic oxidizing properties; it even oxidizes bodies 62 ELEMENTS OF MODERN CHEMISTRY. which possess only feeble affinities for oxygen. In the presenceof alkalies it combines with nitrogen, converting it into nitricacid, which combines with the alkali. It oxidizes silver at ordinary temperatures, converting it iiitothe dioxide AgOl It instantly decomposes potassium iodide,setting free the iodine. It is insoluble in water, but is entirelysoluble in oil of turpentine
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