Sodium arsenate
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(Redirected from Potassium arsenate)
| Names | |
|---|---|
| IUPAC name
Sodium dihydrogen arsenate
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| Other names
sodium arsenate
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| Identifiers | |
13510-46-8  |
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| ChEBI | CHEBI:84070 |
| Properties | |
| H24Na3AsO16 (dodecahydrate) | |
| Molar mass | 423.9 g/mol |
| Appearance | colourless solid |
| Density | 1.517 g/cm3 (dodecahydrate) |
| soluble | |
| 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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| Infobox references | |
Sodium arsenate is the inorganic compound with the formula Na3AsO4. Related salts are also called sodium arsenate, including Na2HAsO4 (disodium hydrogen arsenate) and NaH2AsO4 (sodium dihydrogen arsenate). The trisodium salt is a white or colourless solid that is highly toxic. It is usually handled as the dodecahydrate Na3AsO4.12H2O.[1]
The compound can be obtained by neutralizing arsenic acid:
- H3AsO4 + 3 NaOH → Na3AsO4
The salt (as its dodecahydrate) is isomorphous with trisodium phosphate.[2]
References
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- ↑ Remy, Francis; Guerin, Henri "Radiocrystallographic study of dodecahydrate trisodium arsenate and vanadate Na3AsO4.12H2O and Na3VO4.12H2O, and some hydrates of fluorinated or hydroxylated salts of general formula: M3XO4.xMY.(10 - x)H2O where M = Na, K; X = P, As, V and Y = F, OH" Bulletin de la Societe Chimique de France 1970, vol. 6, pp. 2073-8.
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