High School Chemistry . 86 NITROGEN. run out, else air will become mixed with the gas in thecylinder. Test this gas as in the previous experiment. Tabulate the properties and appearance of nitrogen,oxygen, hydrogen, and Fig. 26. 2.—Additional Exercises. 1. The apparatus represented in Figuie 26 may be used for pre-paring nitrogen by passing airover red-hot copper. A is a Utube filled with calcic chloride,B is a straight tube filled withfine, bright copper filings, andC is a large-mouthed bottleused as a gas holder, one ofits tubes passing through thecork, the other passing to thebottom o
High School Chemistry . 86 NITROGEN. run out, else air will become mixed with the gas in thecylinder. Test this gas as in the previous experiment. Tabulate the properties and appearance of nitrogen,oxygen, hydrogen, and Fig. 26. 2.—Additional Exercises. 1. The apparatus represented in Figuie 26 may be used for pre-paring nitrogen by passing airover red-hot copper. A is a Utube filled with calcic chloride,B is a straight tube filled withfine, bright copper filings, andC is a large-mouthed bottleused as a gas holder, one ofits tubes passing through thecork, the other passing to thebottom of the bottle ; D is apiece of rubber tubing attach-ed to the latter of these tubesin order to convert it into a syphon, and draw off the water from the bottle. E is a spring clipwhich may be kept slightly open by putting a small wedge in starting the experiment, the bottle must be full of water. Whenthe copper has been made red-hot, the syphon must be made to actvery slowly by regulating the clip, and as the water flows out of thebottle, air is drawn through the U tube and passes over the red-hotcopper. The nitrogen is collected in the bottle. At what stage inthis experiment would air begin to pass out of the
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