Calcium hydroxide

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Calcium hydroxide
Calcium hydroxide
IUPAC name
Calcium hydroxide
Ither names
Slaked lime
Milk o lime
Calcium(II) hydroxide
Picklin lime
Hydratit lime
1305-62-0 YesY
ChEBI CHEBI:31341 YesY
ChemSpider 14094 YesY
EC-nummer [1]
Jmol-3D images Image
KEGG D01083 YesY
RTECS nummer EW2800000
Molar mass 74.093 g/mol
Appearance white powder
Odor odorless
Density 2.211 g/cm3, solid
Meltin pynt 580 °C (loses watter)
0.189 g/100 mL (0 °C)
0.173 g/100 mL (20 °C)
0.066 g/100 mL (100 °C)
Solubility product, Ksp 4.68×10−6
Solubility Soluble in glycerol an acids.
Insoluble in alcohol.
Acidity (pKa) 12.4
Basicity (pKb) 2.37
Refractive index (nD) 1.574
Std enthalpy o
−987 kJ·mol−1[1]
Staundart molar
83 J·mol−1·K−1[1]
Safety data sheet [2]
R-phrases R22, R34
S-phrases (S2), S24
NFPA 704
Flammability code 0: Will nae burn. E.g., watter Health code 3: Short exposur could cause serious temporary or residual injury. E.g., chlorine gas Reactivity code 0: Normally stable, even unner fire exposur condeetions, an is nae reactive wi watter. E.g., liquid nitrogen Special hazards (white): no codeNFPA 704 four-colored diamond
Flash pynt {{{value}}}
Lethal dose or concentration (LD, LC):
7340 mg/kg (oral, rat)
7300 mg/kg (mouse)
Related compounds
Ither cations Magnesium hydroxide
Strontium hydroxide
Barium hydroxide
Relatit bases Calcium oxide
Except whaur otherwise notit, data are gien for materials in thair staundart state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Calcium hydroxide, tradeetionally cried slaked lime, is an inorganic compoond wi the chemical formula Ca(OH)2. It is a colourless crystal or white pouder an is obtained when calcium oxide (cried lime or quicklime) is mixed, or "slaked" wi watter. It haes mony names includin hydratit lime, biggers' lime, slack lime, Choona (wird used in Indie, Pakistan an Afghanistan), cal, or picklin lime. Calcium hydroxide is uised in mony applications, includin fuid preparation. Limewatter is the common name for a saturatit solution o calcium hydroxide.

References[eedit | eedit soorce]

  1. 1.0 1.1 Zumdahl, Steven S. (2009). Chemical Principles 6th Ed. Houghton Mifflin Company. p. A21. ISBN 0-618-94690-X. 
  2. "MSDS Calcium hydroxide" (PDF). Retrieved 2011-06-21.