calcium hydroxide

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A white solid, Ca(OH)2, which dissolves sparingly in water (see limewater); hexagonal; r.d. 2.24. It is manufactured by adding water to calcium oxide, a process that evolves much heat and is known as slaking. It is used as a cheap alkali to neutralize the acidity in certain soils and in the manufacture of mortar, whitewash, bleaching powder, and glass.

Subjects: Chemistry.

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