Wells's principles and applications of chemistry; . ill no ozone; but if we heat a glass rod inthe flame of a spirit-lamp, and immerse it moder-ately hot (see Fig. 84), ozone will be abundantlyproduced. Properties.—Ozone has nerer been ob-tained in a separate state, and appears to beentirely insoluble in all hquids. It has a pecu-liar odor, whilst ordinary oxygen is totally devoidof all smelL It possesses powerful bleacumgproperties, and if a solution of sulphate of indigobe poured into a vessel containing ozone, itsdeep blue color is destroyed v\^ith great the same experiment be t
Wells's principles and applications of chemistry; . ill no ozone; but if we heat a glass rod inthe flame of a spirit-lamp, and immerse it moder-ately hot (see Fig. 84), ozone will be abundantlyproduced. Properties.—Ozone has nerer been ob-tained in a separate state, and appears to beentirely insoluble in all hquids. It has a pecu-liar odor, whilst ordinary oxygen is totally devoidof all smelL It possesses powerful bleacumgproperties, and if a solution of sulphate of indigobe poured into a vessel containing ozone, itsdeep blue color is destroyed v\^ith great the same experiment be tried with commonoxygen, no bleaching action takes place. Ozone also exercises a remarkabloinfluence over certain odors ; thus, if a piece of tainted meat be immersed inthis gas (see Fig. 85) the effluvium is instantly destroyed. Ozone is perhaps the most powerful of all oxydizing agents. It corrodeseven organic bodies, such as cork and India-rubber, while fragments of iron,copper, etc., rapidly absorb it, and become converted into oxyds. Silver,. Iodine starch paper may be simply prepared by mixing a little starch with a solutiondf iodide of potassium—a salt obtained of any druggist—and imbuing unsized paper -withthe compound. , QiTESTioxs.—Ho-w may ozone be obtained!is said of the oxydizing influences of ozone ? What are the properties of ozone ? What OXYGEN. 195 Pig. 85. under ordinary circumstances, is notaffected by oxygen, and has hencebeen considered as one of the noblemetals; but if a piece of silver-foil,moistened with water, be plungedinto ozone, it rapidly crumbles intodust—oxyd of silver. Ozone dis-places iodine from its combinationswith the metals, setting the iodinefi-ee. This reaction is so easily pro-duced, and is so sensitive, that it fur-nishes the readiest and most dehcatemethod of detecting the presence oftraces of ozone in the air. A slip ofpaper, as before stated, moistened withstarch and iodide of potassium, andinserted in a vessel containing the
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectchemistry, bookyear18
