The chemical formula of hydrated lime is Ca(OH)2, and its scientific name is calcium hydroxide. The color is white powdery solid, slightly soluble in water, giving off a lot of heat, weakly corrosive and alkaline. The basic uses are bleaching powder, hard water softener, soil acidity improvement, tap water disinfection clarifier and construction industry.
Preparation method: dissolve quicklime in water, that is, CaO+H2O=Ca(OH)2.
Extended data:
Calcium hydroxide is alkaline and can react with indicator, making purple litmus test solution blue and colorless phenolphthalein test solution red.
Calcium hydroxide can react with some nonmetallic oxides to form salt and water.
Calcium hydroxide can react with some acids to form salt and water.
Calcium hydroxide can react with some salts to form another alkali and another salt.