The Pharmaceutical era . number of non-metals, as chlorin, sulfur, etc., it com-bines to form compounds having acid properties, andtherefore known as the hydrogen acids, or certain other non-metals it forms compounds hav-ing basic properties, as with nitrogen in ammonia, NHj,with phosphorus in phosphine, PH3, etc. With carbonit unites in different proportions to form a large numberof compounds known as the hydrocarbons. In addition to the hydracids, hydrogen in connectionwith oxygen combines with many other non-metals toform the oxygen Wrap a smaif piece of clean metal
The Pharmaceutical era . number of non-metals, as chlorin, sulfur, etc., it com-bines to form compounds having acid properties, andtherefore known as the hydrogen acids, or certain other non-metals it forms compounds hav-ing basic properties, as with nitrogen in ammonia, NHj,with phosphorus in phosphine, PH3, etc. With carbonit unites in different proportions to form a large numberof compounds known as the hydrocarbons. In addition to the hydracids, hydrogen in connectionwith oxygen combines with many other non-metals toform the oxygen Wrap a smaif piece of clean metallic sodium in wire gauze and holdit beneath wa-ter with a pairof forceps. Aviolent reactionwill occur in-which hydro-gen is given offand may be col-lected in a ves-sel filled withw iter and in-verted aboveit A large testtube may beFig. 16.—Generating Hydrogen with Metallic used to collectSodium. ^, the gas liber-ated. (Fig. 16.) The reaction probably occurs in twostages, the oxid of the metal being first formed, which. immediately unites with another molecule of water toform the hydroxid and then dissolves, as follows:2Na + H,0 = Na,0+ H^.NajO + HjO = 2NaOH. 2. Holding the mouth of the vessel, containing thegas, downward, bring a light to its lower end. The hy-drogen burns with a nearly colorless flame, water beingthe product. H^-I-O = H^O. If the gas be mixed with a sufficient supply of air, aslight, but harmless, explosion will occur. If the vesselbe large the explosion may be dangerous. 3. If a pair of voltaic cells are at hand, bring their op-posite electrodes into a vessel of water acidulated withsulfuric acid, and invert over each electrode a large testtube of water. The galvanic current will decompose thewater into its two constituents, which rise into the that one tube contains about twice the volume ofgas that the other does. Bring the mouth of the tube containing the greaterproportion of gas into contact with a flame. Note whatoccurs, and write the equati
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Keywords: ., bookcentury1800, booksubjectdrugs, booksubjectpharmacy, bookyear1
