Potassium hydroxide
Appearance
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Names | |
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IUPAC name
Potassium hydroxide
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Ither names
Caustic potash, Potash lye, Potassia, Potassium hydrate
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Identifiers | |
3D model (JSmol)
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ChEBI | |
ChemSpider | |
EC Nummer | 215-181-3 |
PubChem CID
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RTECS nummer | TT2100000 |
UNII | |
UN nummer | 1813 |
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Properties | |
HKO | |
Molar mass | 56.11 g·mol−1 |
Appearance | white solid, deliquescent |
Odour | odorless |
Density | 2.044 g/cm3 (20 °C)[1] 2.12 g/cm3 (25 °C)[2] |
Meltin pynt | 406 °C (763 °F; 679 K) |
Bylin pynt | 1,327 °C (2,421 °F; 1,600 K) |
85 g/100 g (-23.2 °C) 97 g/100 mL (0 °C) 121 g/100 mL (25 °C) 138.3 g/100 mL (50 °C) 162.9 g/100 mL (100 °C)[1][3] | |
Solubility | soluble in alcohol, glycerol insoluble in ether, liquid ammonia |
Solubility in methanol | 55 g/100 g (28 °C)[2] |
Acidity (pKa) | 13.5 (0.1 M) |
Refractive index (nD) | 1.409 (20 °C) |
Structur | |
rhombohedral | |
Thermochemistry | |
Speceefic heat capacity, C | 65.87 J/mol·K[2] |
Staundart molar entropy S |
79.32 J/mol·K[4][2] |
Std enthalpy o formation ΔfH |
-425.8 kJ/mol[4][2] |
Gibbs free energy (ΔfG˚)
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-380.2 kJ/mol[2] |
Hazards | |
GHS pictograms | ![]() ![]() |
GHS signal wird | Danger |
GHS hazard statements | H302, H314[5] |
GHS precautionary statements | P280, P305+351+338, P310[5] |
NFPA 704 | |
Flash pynt | Non-flammable |
Lethal dose or concentration (LD, LC): | |
LD50 (Median dose)
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273 mg/kg (oral, rat)[6] |
Relatit compoonds | |
Ither anions
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Potassium hydrosulfide Potassium amide |
Ither cations
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Lithium hydroxide Sodium hydroxide Rubidium hydroxide Caesium hydroxide |
Except whaur itherwise notit, data are gien for materials in thair staundart state (at 25 °C [77 °F], 100 kPa). | |
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Infobox references | |
Potassium hydroxide is an inorganic compoond wi the formula KOH, commonly cried caustic potash.
References
[eedit | eedit soorce]- ↑ a b Lide, D. R., ed. (2005). CRC Handbook of Chemistry and Physics (86th ed.). Boca Raton (FL): CRC Press. p. 4-80. ISBN 0-8493-0486-5.
- ↑ a b c d e f "Archived copy". Archived frae the original on 18 Mey 2014. Retrieved 11 September 2014.CS1 maint: archived copy as title (link)
- ↑ Seidell, Atherton; Linke, William F. (1952). [Google Books Solubilities of Inorganic and Organic Compounds] Check
|url=
value (help). Van Nostrand. Retrieved 29 Mey 2014. - ↑ a b Zumdahl, Steven S. (2009). Chemical Principles 6th Ed. Houghton Mifflin Company. p. A22. ISBN 0-618-94690-X.
- ↑ a b c Sigma-Aldrich Co. Retrieved on 2014-05-18.
- ↑ http://chem.sis.nlm.nih.gov/chemidplus/rn/1310-58-3