This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1904 edition. Excerpt: ... CHAPTER VII. NITROGEN, PHOSPHORUS, ARSENIC, AND ANTIMONY. NITROGEN.--N. (i) Preparation.--1. In a dish swimming on water place a piece of phosphorus and ignite it; invert a beaker over it (Fig. 26). What becomes of the phosphorus? When the latter has F, g-"6 Flg 27ceased burning, restore the level of ...
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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1904 edition. Excerpt: ... CHAPTER VII. NITROGEN, PHOSPHORUS, ARSENIC, AND ANTIMONY. NITROGEN.--N. (i) Preparation.--1. In a dish swimming on water place a piece of phosphorus and ignite it; invert a beaker over it (Fig. 26). What becomes of the phosphorus? When the latter has F, g-"6 Flg 27ceased burning, restore the level of the water, and note the decrease in the volume of the air. Test the residual gas with a burning taper. 2. Heat gently in a small flask or retort a mixture of 10 grams of sodium nitrite, 5 grams of ammonium chloride and about 20 cc. of water. Be careful not to overheat the mixture. Collect the gas over water. Fill five bottles with this gas. (2) Has it color, taste, odor? Does it burn or support combustion? Is the gas heavier than air? Does it unite readily with other elements? What other gases are invariably present in nitrogen obtained from atmospheric air, and how do they affect its density? (3) Determine the Weight of a Liter of Nitrogen.--A roundbottom flask is fitted, as shown in Fig. 27. Pour about 30 cc. of water into it, and insert the rubber stopper to the mark. Boil the water, while the clip is open, until all the air has been expelled from the flask. Steam should be allowed to escape for about five minutes. Then close the tube with the clip, and remove the flame. Cool and weigh the flask. Read the temperature and barometric pressure in the balanceroom. Connect the flask with the tube, b, of the aspirator, containing nitrogen, and arranged as in Fig. 28. The rubber tube, a, is made to dip under water, and the clip is gradually opened, allowing nitrogen to enter the flask. Now raise the vessel containing the water into which the rubber tube dips, so that the water in it is at a higher level than that in the aspirator. Close the clip....
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