The Young Chemist

The Young Chemist

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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. 1889 edition. Excerpt: ...Ferrous sulphate. (See Experiment 113.) Phosphorus, P. 116. Distribution of Phosphorus. In nature, Phosphorus occurs, principally, in bones. Of dry bone, more than 50 per cent, is Calcic phosphate, Ca3(P04)2. In the arts, the element Phosphorus and many Phosphates are employed. Phosphorus is very poisonous and very combustible. It should never be touched with the hands, since dangerous burns are often caused by it. 117. Phosphorus burns into Phosphoric oxide (P20s). Experiment.--Cut a piece of Phosphorus under water. Dry, upon a piece of filter-paper, a fragment smaller than a pea; place the fragment upon a piece of wood, metal, or porcelain. After setting the Phosphorus on fire, cover it quickly with a large jar or bell-glass. The white fumes are Phosphoric anhydride (P.O.). 118. Phosphoric anhydride, with water, produces Phosphoric acid (H3P04) Experiment.--The Phosphoric anhydride of the last experiment is a white, snow-like substance which quickly absorbs moisture from the atmosphere--so quickly, in fact, that the white substance cannot always be secured. If a little of it can be obtained, throw it on water; it hisses, owing to the heat of combination. It forms Phosphoric acid (H3 P 04).-Phosphorus burning in air. Apply a fragment of moist blue litmus-paper to the place, under the jar, where the Phosphoric acid is supposed to be. A reddening of the paper will indicate the presence of the acid. Arsenic, As. 119. Distribution of Arsenic. In nature, Arsenic occurs as a constituent of a large number of metallic ores. In the arts, it occurs in the form of Arsenious oxide (As203), also called White-arsenic. It is also contained in Paris-green. Most of the compounds of Arsenic are very poisonous; they must be handled with great care. more

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  • Paperback
  • 189 x 246 x 1mm | 68g
  • English
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  • 1236748689
  • 9781236748683