Lead(II) hydroxide
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| Names | |
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| IUPAC name
Lead(II) hydroxide
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| Other names
lead hydroxide
plumbous hydroxide |
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| Identifiers | |
[1] 1319-46-6[1]  |
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| ChemSpider | 8035300  |
| Jmol 3D model | Interactive image |
| PubChem | 9859601 |
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| Properties | |
| Pb(OH)2 | |
| Molar mass | 241.21 g/mol |
| Appearance | white amorphous powder |
| Density | 7.41 g/cm3 [2] |
| Melting point | 135 °C (275 °F; 408 K) (decomposes) |
| 1.55 g/100 mL (20 °C) | |
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Solubility product (Ksp)
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1.42 x 10−20 |
| Solubility | soluble in dilute acid and alkalis; insoluble in acetone and acetic acid |
| Vapor pressure | {{{value}}} |
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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 verify (what is ?) |
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| Infobox references | |
Lead(II) hydroxide, Pb(OH)2, is a hydroxide of lead, with lead in oxidation state +2. Although it appears a fundamentally simple compound, it is doubtful if lead hydroxide is stable as a solid phase.[3] Lead basic carbonate (PbCO3·2Pb(OH)2) or lead(II) oxide (PbO) is encountered in practice where lead hydroxide is expected. This has been a subject of considerable confusion in the past.
Preparation
When an alkali hydroxide is added to a solution of a lead(II) salt, then a hydrated lead oxide PbO·xH2O (with x < 1) is obtained. Careful hydrolysis of lead(II) acetate solution yields a crystalline product with a formula 6PbO·2H2O = Pb6O4(OH)4.[4]
Reactions
In solution, lead(II) hydroxide is a somewhat weak base, forming lead(II) ion, Pb2+, under weakly acidic conditions. This cation hydrolyzes and, under progressively increasing alkaline conditions, forms Pb(OH)+, Pb(OH)2(aqueous), Pb(OH)3−, and other species, including several polynuclear species, e.g., Pb4(OH)44+, Pb3(OH)42+, Pb6O(OH)64+.[4]
Lead hydrate
The name Lead hydrate has sometimes been used in the past but it is unclear whether this refers to Pb(OH)2 or PbO·xH2O.[5] [6]
References
- ↑ http://www.commonchemistry.org/ChemicalDetail.aspx?ref=1319-46-6&terms=lead(II)+hydroxide
- ↑ Pradyot Patnaik. Handbook of Inorganic Chemicals. McGraw-Hill, 2002, ISBN 0-07-049439-8
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 4.0 4.1 Von Egon Wiberg, Nils Wiberg, Arnold Frederick Holleman, "Inorganic Chemistry", Academic Press, 2001 (Google books).
- ↑ http://www.google.com/patents/US527830
- ↑ http://www.google.com/patents/US496109
