Sodium zincate
Chemical compound From Wikipedia, the free encyclopedia
Sodium zincate refers to anionic zinc oxides or hydroxides, depending on conditions. In the applications of these materials, the exact formula is not necessarily important and it is likely that aqueous zincate solutions consist of mixtures.[1]
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| Names | |
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| IUPAC name
sodium tetrahydroxozincate(II) | |
| Identifiers | |
3D model (JSmol) |
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| ECHA InfoCard | 100.032.117 |
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PubChem CID |
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CompTox Dashboard (EPA) |
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| Properties | |
| Na2[Zn(OH)4] | |
| Molar mass | 179.418 g/mol |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Hydroxyzincates
Solutions of sodium zincate may be prepared by dissolving zinc, zinc hydroxide, or zinc oxide in an aqueous solution of sodium hydroxide.[2] Simplified equations for these complex processes are:
- ZnO + H2O + 2 NaOH → Na2Zn(OH)4
- Zn + 2 H2O + 2 NaOH → Na2Zn(OH)4 + H2
From such solutions, one can crystallize salts of containing the anions Zn(OH)42−, Zn2(OH)62−, and Zn(OH)64−. Na2Zn(OH)4 consists of tetrahedral zincate ion and octahedral sodium cations.[3]
The salt Sr2Zn(OH)6 features zinc in an octahedral coordination sphere.
Oxozincates
Related oxides are also known such as Na2ZnO2,[4] Na2Zn2O3,[5] Na10Zn4O9.[6]
References
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