A text-book on chemistryFor the use of schools and colleges . rus. — Sulphureted Hydrogen.—Preparation and Properties.— Uses as a Test.—Sulphur Waters.—Persulphide of Hydrogen. Selenium. Phosphorus.—Made from Bone-earth.—Properties.—Shines in the Dark.—Inflammability. — AllotropicPhosphorus.— Compounds with Oxygen. Sulphureted Hydrogen. HS— gas may be prepared by the action Fig. hydrochloric acid on sulphide of anti-mony, in the apparatus Fig. 248, or of di-lute sulphuric acid on sulphide of iron. Itmust be collected over either warm or saltwater. If made by sulphide of iron, thea
A text-book on chemistryFor the use of schools and colleges . rus. — Sulphureted Hydrogen.—Preparation and Properties.— Uses as a Test.—Sulphur Waters.—Persulphide of Hydrogen. Selenium. Phosphorus.—Made from Bone-earth.—Properties.—Shines in the Dark.—Inflammability. — AllotropicPhosphorus.— Compounds with Oxygen. Sulphureted Hydrogen. HS— gas may be prepared by the action Fig. hydrochloric acid on sulphide of anti-mony, in the apparatus Fig. 248, or of di-lute sulphuric acid on sulphide of iron. Itmust be collected over either warm or saltwater. If made by sulphide of iron, theaction is as follows: m FeS+S03, HO=HS±FeO, is called also hydrosulphuric acid andsulphydric Sulphureted hydrogen is a colorless gas, having arfetid odor like rotten eggs. It is so diffusible that avery small quantity will taint the air of a large is absorbed by water, that fluid taking up three times What are the uses of hyposulphurous acid ? How may sulphuret-ed hydrogen be prepared ? What are its properties ?. 272 SV/LPHURETED HYDROGEN. Fig. 240, its volume at 60°. In this form it is rapidly decomposedby the contact of air, the hydrogen forming water with the oxygen, and the sul-phur depositing. The spe-cific gravity of sulphuretedhydrogen gas is ;one hundred cubic inchesweigh grains. It isinflammable, and may beburnt from a jet, as in If the access of airis unlimited, sulphurousacid and water arise; iflimited, water is producedand sulphur deposited. Itreddens litmus slightly,and combines with met-als to form sulphides. Forthis latter reason it is veryvaluable in analytical op-erations, many of the sul-phides being insoluble andhighly colored: antimo-ny gives an orange .pre-cipitate, arsenic a yellow,lead a brown, manganesea flesh-colored. It tarnishes silver, the metal passingthrough various shades of yellow and orange to black-ness. It is liquefied by a pressure of 17 atmospheresat 50°, the specific gravi
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