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calcium hydroxide
calcium hydroxide Calcium hydroxide.

calcium hydroxide

chemical compound
Also known as: hydrated lime, slaked lime
Written by
Ken Stewart
Ken Stewart is a former educator with an honours degree in chemistry, physics, and mathematics. 
Ken Stewart
Fact-checked by
Britannica Editors
Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree....
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History

calcium hydroxide (Ca(OH)2), a soft white powder that is widely used as a raw material in the chemical industry. It forms when calcium oxide is mixed with water. The compound has two hydroxide ions (OH−) for each ion of calcium (Ca2+). The chemical is ionic, with aqueous and electrolytic dissociations both producing calcium ions and hydroxide ions. Calcium hydroxide is usually produced through the reaction of calcium oxide (CaO) with water (H2O). This reaction is...

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