Potassium selenate
Identifiers | |
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3D model (JSmol) |
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ECHA InfoCard | 100.029.286 |
EC Number | 232-214-7 |
PubChem CID |
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RTECS number | VS6600000 |
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Properties | |
K 2SeO 4 | |
Molar mass | 221.2 g/mol[1] |
Appearance | colorless crystals hygroscopic |
Odor | odorless |
Density | 3.07 g/cm3[2] |
1.07 g/ml (0 °C) 1.11 g/ml (20 °C) 1.22 g/ml (100 °C) | |
Refractive index (nD) |
1.539 |
Structure | |
orthorhombic | |
Hazards | |
NFPA 704 | |
Related compounds | |
Other anions |
Potassium sulfate |
Other cations |
Sodium selenate |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
Infobox references | |
Potassium selenate, K
2SeO
4, is an odorless, white solid that forms as the potassium salt of selenic acid. It is used in photography.
Preparation
Potassium selenate is produced by the reaction of selenium trioxide and potassium hydroxide.
- SeO3 + 2 KOH → K2SeO4 + H2O
Alternatively, it can be made by reacting selenous acid with potassium hydroxide, and then oxidizing the resulting potassium selenite with bromine.[3]
- H2SeO3 + 2 KOH → K2SeO3 + 2 H2O
- K2SeO3 + 2 KOH + Br2 → K2SeO4 + 2 KBr + H2O
References
- ↑ "Potassium Selenate", EndMemo.com
- ↑ "Potassium Selenate", AmericanElements.com
- ↑ https://books.google.de/books?id=dLLfBAAAQBAJ&pg=PA305#v=onepage&q&f=false
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