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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...