An introduction to practical chemistry : including analysis . Fig. 17 Preparation of Ammoniacal Gas. possible, and without loss of time transfer the mixtureto the retort. The following decomposition takes place:— XH4Cl+CaO=CaCl+/fO+NH3. If the gas does not come over rapidly, a gentle heatmay be applied. When three or four bottles have beenfilled, proceed with the following ex-periments :— 57. Observe the effect of the gas on alighted taper: it extinguishes the flame,and at the same time shows a slighttendency to burn with a pale greenflame. 58. Remove the stopper from one ofthe bottles, and cl
An introduction to practical chemistry : including analysis . Fig. 17 Preparation of Ammoniacal Gas. possible, and without loss of time transfer the mixtureto the retort. The following decomposition takes place:— XH4Cl+CaO=CaCl+/fO+NH3. If the gas does not come over rapidly, a gentle heatmay be applied. When three or four bottles have beenfilled, proceed with the following ex-periments :— 57. Observe the effect of the gas on alighted taper: it extinguishes the flame,and at the same time shows a slighttendency to burn with a pale greenflame. 58. Remove the stopper from one ofthe bottles, and close the mouth with adry glass plate (read paragraph 52); theninvert it, and having placed it underwater, remove the glass plate and ob-serve the rapid absorption. That whichremains unabsorbed is atmospheric 59. Test the liquid obtained in thelast experiment (which is a weak solu-tion of ammonia) with turmeric and rcd- 1 Water at common temperatures is capable of absorbing nearly 700times its volume of ammoniacal 40 D I S T I L I, A T I 0 N. deuecl litmus-paper ; the first is turned brown, the latterlias the blue color restored. 60. Remove the stopper from a bottle of the gas, andalso from the reserved bottle of hydrochloric acid (54),replacing them with dry glass plates. Then invert thelatter over the bottle of ammonia (Fig. 17), and cau-tiously remove the glass plates so as to allow the gasesto mix. Dense white fumes, consisting of muriate ofammonia (NH4C1) are immediately produced, which ina short time collect in flakes, and fall like snow on thesides and bottom of the vessels. In this combination ofthe hydrochloric acid with the ammonia, considerableheat is evolved. CHAPTER in. DISTILLATION. SECTION I. Distillation of Water. 61. Adapt a cork to the neck of a quilled receiver,and bore a hole through it to fit the neck of the retort,which should pass through it for about two inches.
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectchemistry, bookyear18
