Chemical lecture experiments . the lamp chimney and ignited at thebottom. A regular stream of chlorine, which should not beallowed to bubble through a liquid, is conducted throughthe glass tube which extends to the centre of the tube is inserted in a two-holed rubberstopper which fits the base of the chim-ney. As the tube passes through thehydrogen flame the chlorine takes fireand may be seen to be burning at theend of the tube in the atmosphere ofhydrogen. The cork is then inserted inthe base of the chimney. The hydro-chloric acid gas together with the excessof hydrogen issues th
Chemical lecture experiments . the lamp chimney and ignited at thebottom. A regular stream of chlorine, which should not beallowed to bubble through a liquid, is conducted throughthe glass tube which extends to the centre of the tube is inserted in a two-holed rubberstopper which fits the base of the chim-ney. As the tube passes through thehydrogen flame the chlorine takes fireand may be seen to be burning at theend of the tube in the atmosphere ofhydrogen. The cork is then inserted inthe base of the chimney. The hydro-chloric acid gas together with the excessof hydrogen issues through the open tube(15 cm. long) in the second hole of thecork. As the hydrochloric acid gas comesin contact with the air it fumes dipping the open end of the tube afew millimeters beneath the surface of water in a beakerthe hydrochloric acid will be absorbed and the excess ofhydrogen will bubble through the liquid. By carefullyregulating the flow of hydrogen the minimum quantitymay be caused to escape Fig. 44 90 CHEMICAL LECTURE EXPERIMENTS It is of the utmost importance in carrying out this experi-ment to avoid the formation of an explosive mixture ofhydrogen and chlorine inside the lamp chimney, and conse-quently, if the flame of chlorine should be accidentlyextinguished, the current of chlorine should be stopped andthe cork removed, and, after filling the lamp chimney againwith hydrogen, the experiment repeated. Apparatus (Fig. 44) ; CI supply ; H generator (Kipp). 16. Explosion of a mixture of hydrogen and chlorine byburning magnesium. — The explosion of a mixture of equalvolumes of hydrogen and chlorine may be effected by theactinic rays of a magnesium light. A 100 cc. cylinder is filled with chlorine and placedmouth to mouth with a cylinder of equal size filled withhydrogen. The mixture of the two gases must be made bydiffused daylight only or, better, by gaslight. The jars arewell shaken, separated by cardboard disks, and one of themplaced in
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