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| Names | |
|---|---|
| IUPAC name
Zinc hydroxide
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| Identifiers | |
3D model (JSmol)
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| ChemSpider | |
| ECHA InfoCard | 100.039.816 |
PubChem CID
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| UNII | |
CompTox Dashboard (EPA)
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| Properties | |
| Zn(OH)2 | |
| Molar mass | 99.424 g/mol |
| Appearance | white powder |
| Density | 3.053 g/cm3, solid |
| Melting point | 125 °C (257 °F; 398 K) (decomposition) |
| slightly soluble | |
Solubility product (Ksp)
|
3.0×10−17 |
| Solubility in alcohol | insoluble |
| Acidity (pKa) | 3.12, 3.39[1] |
| −67.0·10−6 cm3/mol | |
| Thermochemistry | |
Std enthalpy of
formation (ΔfH⦵298) |
−642 kJ·mol−1[2] |
| Hazards | |
| Flash point | Non-flammable |
| Related compounds | |
Other anions
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Zinc oxide |
Other cations
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Cadmium hydroxide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Zinc hydroxide Zn(OH)2 is an inorganic chemical compound. It also occurs naturally as 3 rare minerals: wülfingite (orthorhombic), ashoverite and sweetite (both tetragonal).
Like the hydroxides of other metals, such as lead, aluminium, beryllium, tin and chromium, Zinc hydroxide (and Zinc oxide), is amphoteric. Thus it will dissolve readily in a dilute solution of a strong acid, such as HCl, and also in a solution of an alkali such as sodium hydroxide.
- ^ Perrin, D. D., ed. (1982) [1969]. Ionisation Constants of Inorganic Acids and Bases in Aqueous Solution. IUPAC Chemical Data (2nd ed.). Oxford: Pergamon (published 1984). Entry 265. ISBN 0-08-029214-3. LCCN 82-16524.
- ^ Zumdahl, Steven S. (2009). Chemical Principles 6th Ed. Houghton Mifflin Company. p. A23. ISBN 978-0-618-94690-7.