Calcium hydroxide
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| Names | |
|---|---|
| IUPAC name
Calcium hydroxide
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| Ither names
Slaked lime
Milk o lime Calcium(II) hydroxide Picklin lime Hydratit lime | |
| Identifiers | |
3D model (JSmol)
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| ChEBI | |
| ChemSpider | |
| EC Nummer | 215-137-3 |
| KEGG | |
PubChem CID
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| RTECS nummer | EW2800000 |
| UNII | |
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| Properties | |
| Ca(OH)2 | |
| Molar mass | 74.093 g/mol |
| Appearance | white powder |
| Odour | 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 |
| Thermochemistry | |
| Staundart molar entropy S |
83 J·mol−1·K−1[1] |
| Std enthalpy o formation ΔfH |
−987 kJ·mol−1[1] |
| Hazards | |
| R-phrases | R22, R34 |
| S-phrases | (S2), S24 |
| NFPA 704 | |
| Flash pynt | Non-flammable |
| Lethal dose or concentration (LD, LC): | |
LD50 (Median dose)
|
7340 mg/kg (oral, rat) 7300 mg/kg (mouse) |
| Relatit compoonds | |
Ither cations
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Magnesium hydroxide Strontium hydroxide Barium hydroxide |
Except whaur itherwise notit, data are gien for materials in thair staundart state (at 25 °C [77 °F], 100 kPa). | |
 verify (whit is  ?)
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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
- ↑ a b Zumdahl, Steven S. (2009). Chemical Principles 6th Ed. Houghton Mifflin Company. p. A21. ISBN 0-618-94690-X.
- ↑ "MSDS Calcium hydroxide" (PDF). Retrieved 21 Juin 2011.
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