Potassium selenate

Potassium selenate
Identifiers
CAS Number	7790-59-2 ;
3D model (JSmol)	Interactive image;
ECHA InfoCard	100.029.286
EC Number	232-214-7;
PubChem CID	62680;
RTECS number	VS6600000;
UNII	99798PU7MI ;
CompTox Dashboard (EPA)	DTXSID00889579 ;
	InChI InChI=1S/2K.H2O4Se/c;;1-5(2,3)4/h;;(H2,1,2,3,4)/q2*+1;/p-2 Key: YAZJAPBTUDGMKO-UHFFFAOYSA-L;
	SMILES [K+].[K+].[O-][Se]([O-])(=O)=O;
Properties
Chemical formula	K; 2SeO; 4
Molar mass	221.2 g/mol[1]
Appearance	colorless crystals ; hygroscopic
Odor	odorless
Density	3.07 g/cm3[2]
Solubility in water	1.07 g/ml (0 °C); 1.11 g/ml (20 °C); 1.22 g/ml (100 °C)
Refractive index (nD)	1.539
Structure
Crystal structure	orthorhombic
Hazards
NFPA 704 (fire diamond)	1 3 0
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.

SeO 3 + 2 KOH \to K 2 SeO 4 + H 2 O

Alternatively, it can be made by reacting selenous acid with potassium hydroxide, and then oxidizing the resulting potassium selenite with bromine.[3]

H 2 SeO 3 + 2 KOH \to K 2 SeO 3 + 2 H 2 O

K 2 SeO 3 + 2 KOH + Br 2 \to K 2 SeO 4 + 2 KBr + H 2 O

gollark: This is especially attractive given current semiconductor product shortages.

gollark: They are sold below cost to make back money on the games.

gollark: The UK median household income is £30000. This is sufficient to buy 15 RTX 3090s, which is a good use of money. Unfortunately I don't actually get that much.

gollark: We also need capital to replace the backup disk with one which is not rapidly failing.

gollark: Donate £91938438383 to osmarks.net and we can buy more!

References

"Potassium Selenate K2SeO4 Molecular Weight". EndMemo. Retrieved 2019-09-03.
"Potassium Selenate". American Elements. Retrieved 2019-09-03.
Rosenfeld, Irene; Beath, Orville A. (2013). Selenium: Geobotany, Biochemistry, Toxicity, and Nutrition. Elsevier Science. p. 305. ISBN 978-1-4832-7590-1.

This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.

[1] "Potassium Selenate K2SeO4 Molecular Weight". EndMemo. Retrieved 2019-09-03.

[2] "Potassium Selenate". American Elements. Retrieved 2019-09-03.

[3] Rosenfeld, Irene; Beath, Orville A. (2013). Selenium: Geobotany, Biochemistry, Toxicity, and Nutrition. Elsevier Science. p. 305. ISBN 978-1-4832-7590-1.