Potassium hydrosulfide
Names | |
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IUPAC name
Potassium hydrosulfide | |
Other names
Potassium bisulfide, Potassium sulfhydrate, potassium hydrogen sulfide | |
Identifiers | |
1310-61-8 | |
3D model (Jmol) | Interactive image |
ChemSpider | 92246 |
ECHA InfoCard | 100.013.803 |
EC Number | 215-182-9 |
PubChem | 102109 |
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Properties | |
KHS[1] | |
Molar mass | 72.171 g/mol |
Appearance | white solid |
Density | 1.68–1.70 g/cm3 |
Melting point | 455 °C (851 °F; 728 K) |
good | |
Hazards | |
Main hazards | Flammable solid, stench, releases hydrogen sulfide |
NFPA 704 | |
Related compounds | |
Other anions |
Potassium hydroxide |
Other cations |
Sodium hydrosulfide |
Related compounds |
potassium sulfide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
verify (what is ?) | |
Infobox references | |
Potassium hydrosulfide is the inorganic compound with the formula KHS. This colourless salt consists of the cation K+ and the bisulfide anion [SH]−. It is the product of the half-neutralization of hydrogen sulfide with potassium hydroxide. The compound is used in the synthesis of some organosulfur compounds.[2] It is prepared by neutralizing aqueous KOH with H2S.[3] Aqueous solutions of potassium sulfide consist of a mixture of potassium hydrosulfide and potassium hydroxide.
The structure of the potassium hydrosulfide resembles that for potassium chloride. Their structure is however complicated by the non-spherical symmetry of the SH− anions, but these tumble rapidly in the solid high temperatures.[4]
Addition of sulfur gives dipotassium pentasulfide.
Synthesis
Potassium hydrosulfide is synthesized by the reaction between a solution of potassium sulfide with excess hydrogen sulfide.
References
- ↑ Lide, David R., ed. (2009). CRC Handbook of Chemistry and Physics (90th ed.). Boca Raton, Florida: CRC Press. p. 4-82. ISBN 978-1-4200-9084-0.
- ↑ Dittmer, D. C. "Potassium Hydrogen Sulfide" in Encyclopedia of Reagents for Organic Synthesis (Ed: L. Paquette) 2004, J. Wiley & Sons, New York. doi: 10.1002/047084289.
- ↑ Kurzer, F. Lawson, A. "Thiobenzoylthioglycolic Acid" Organic Syntheses, Collected Volume 5, p.1046 (1973).
- ↑ Haarmann, F; Jacobs, H.; Roessler, E.; Senker, J. (2002). "Dynamics of Anions and Cations in Hydrogensulfides of Alkali Metals (NaHS, KHS, RbHS): A Proton Nuclear Magnetic Resonance Study". Journal of Chemical Physics. 117 (3): 1269–1276. doi:10.1063/1.1483860.