Elementary chemistry, for high school and academies by Arey Albert Llewellyn

Author:Arey, Albert Llewellyn. [from old catalog]
Language: eng
Format: epub, pdf
Tags: Chemistry
Publisher: New York, The Macmillan company;
Published: 1899-03-25T05:00:00+00:00

Uses. — In making mortar and cement, in the calcium light, and for drying gases in the manufacture of illuminating gas, as well as in the laboratory.

207. Calcium Hydroxid, Ca(0H) 2 . Preparation. — As stated above, by treating calcium oxid with about one-third of its weight of water.

Properties. — It is a white, alkaline, caustic powder, somewhat soluble in water, and having a strong affinity for carbon dioxid and hydrogen sulfid. It attacks animal tissues, as is shown by a plasterer's hand, and by its use in removing hair from hides in the tannery.

Uses. —Making mortar and whitewash, purifying gas, and in making brown sugar and glucose. Lime water is a solution of calcium hydroxid in water.

208. Calcium Carbonate, CaC0 3 . Occurrence. — Calcite, chalk, marl, marble, Mexican onyx, and limestone are nearly pure calcium carbonate. It is the chief constituent of the shells of mollusks, corals, etc.

Properties. — It is sparingly soluble in water, but dissolves readily in water containing carbon dioxid, from which it is precipitated when the water loses its carbon dioxid. The formation of stalactites, stalagmites, travertin, etc., illustrate this property.

Uses. —Making quicklime, building, making glass, reducing iron ore, etc.

209. Calcium Chlorid, CaCl,. — The properties of this substance are very different from those of the so-called " chlorid of lime." This salt is odorless, it deliquesces,* it has a strong affinity for water, and absorbs it from air or moist

* Define term.

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