A popular chemistry; . orns of the hart. It received the nameammonia, by which it is now more generally known,from the temple of Jupiter Ammon, near which sal-ammoniac, one of its compounds, was once manu-factured. The aqua am-monia of the shops,which is merely a strongsolution of the gas inH20, is obtained fromthe incidental productsof the gas-works in largequantities. (See p. 72.)Its pungent odor canoften be detected neardecaying vegetable andanimal matter. Preparation. — NH3 isordinarily prepared byheating sal-ammoniacwith lime.* The reac-tion may be represented as follows : 2NH4C1 + CaO =
A popular chemistry; . orns of the hart. It received the nameammonia, by which it is now more generally known,from the temple of Jupiter Ammon, near which sal-ammoniac, one of its compounds, was once manu-factured. The aqua am-monia of the shops,which is merely a strongsolution of the gas inH20, is obtained fromthe incidental productsof the gas-works in largequantities. (See p. 72.)Its pungent odor canoften be detected neardecaying vegetable andanimal matter. Preparation. — NH3 isordinarily prepared byheating sal-ammoniacwith lime.* The reac-tion may be represented as follows : 2NH4C1 + CaO = 2NH3 + H20 + is also conveniently obtained for experiments bygently heating aqua ammonia. Properties.—NH3 is a colorless gas, having a pecul-iar pungent and suffocating odor, and a caustic taste. * This may be illustrated by simply mixing in a cup some powdered sal-ammoniac (ammonium chloride) and lime (calcium oxide), when the ammo-nia may be detected by its odor, and the bluing of moist red Preparing NH3 36 INORGANIC CHEMISTRY. It can be readily condensed to a liquid by cold orpressure. When liquefied by pressure, it passes rap-idly back into the gaseous state when the pressureis removed, and in doing so, absorbs so much heat Fig. 11.
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Keywords: ., bookcentury1800, bookdecade18, booksubjectchemistry, bookyear1887
