Chemistry:Radium hydroxide
From HandWiki
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3D model (JSmol)
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| ChemSpider | |
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| Properties | |
| H2O2Ra | |
| Molar mass | 260 g·mol−1 |
| Appearance | colorless crystals |
| soluble | |
| Related compounds | |
Related compounds
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Barium hydroxide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
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Tracking categories (test):
Radium hydroxide is an inorganic compound of radium, hydrogen, and oxygen with the chemical formula Ra(OH)
2.[1] Stability constant of aqueous RaOH+ ion pair at zero ionic strength is equal to 5.[2]
Synthesis
- Ra + 2H
2O → Ra(HO)
2 + H
2
- Ra + 2H
- The reaction of radium oxide and water can also generate radium hydroxide, and the reaction releases a lot of heat:[citation needed]
- RaO + H
2O → Ra(HO)
2
- RaO + H
- The compound can also be prepared by reacting radium nitrate with NaOH in solution.[citation needed]
Physical properties
Radium hydroxide forms colorless crystals that dissolve in water better than does barium hydroxide, and has more basic properties.
The compound forms a hydrate of the composition Ra(OH)
2 · 8H2O.[4]
Radium hydroxide is a caustic, toxic, and corrosive substance. It is significantly more toxic than are barium hydroxide (Ba(OH)
2) and strontium hydroxide (Sr(OH)
2).
References
- ↑ Brown, Paul L.; Matyskin, Artem V.; Ekberg, Christian (1 June 2022). "The aqueous chemistry of radium" (in en). Radiochimica Acta 110 (6–9): 505–513. doi:10.1515/ract-2021-1141. ISSN 2193-3405. https://www.degruyter.com/document/doi/10.1515/ract-2021-1141/html?lang=en. Retrieved 8 June 2023.
- ↑ Matyskin, Artem V.; Brown, Paul L.; Ekberg, Christian (2019). "Weak barium and radium hydrolysis using an ion exchange method and its uncertainty assessment". Journal of Chemical Thermodynamics 128: 362–371. doi:10.1016/j.jct.2018.08.037. https://www.sciencedirect.com/science/article/pii/S0021961418303239.
- ↑ "Alkaline Earth Hydroxide - an overview | ScienceDirect Topics". ScienceDirect. https://www.sciencedirect.com/topics/chemistry/alkaline-earth-hydroxide.
- ↑ Schweitzer, George K.; Pesterfield, Lester L. (14 January 2010) (in en). The Aqueous Chemistry of the Elements. Oxford University Press. p. 448. ISBN 978-0-19-974219-6. https://books.google.com/books?id=-TNhhlGcCzwC&dq=%22Ra%28OH%292%22+solubility&pg=PA148. Retrieved 8 June 2023.
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