Strontium hydroxide

Strontium hydroxide
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.038.501
EC Number
  • 242-367-1
847042
UNII
  • InChI=1S/2H2O.Sr/h2*1H2;/q;;+2/p-2 checkY
    Key: UUCCCPNEFXQJEL-UHFFFAOYSA-L checkY
  • InChI=1/2H2O.Sr/h2*1H2;/q;;+2/p-2
    Key: UUCCCPNEFXQJEL-NUQVWONBAP
  • [Sr+2].[OH-].[OH-]
Properties
Sr(OH)2
Molar mass
  • 121.63 g⋅mol−1 (anhydrous)
  • 139.65 g⋅mol−1 (monohydrate)
  • 265.76 g⋅mol−1 (octahydrate)
Appearance colourless orthorhombic crystals, hygroscopic
Density
  • 3.625 g/cm3 (anhydrous)
  • 1.90 g/cm3 (octahydrate)
Melting point anhydrous: 535 °C (995 °F; 808 K)
  • monohydrate: 450 °C (842 °F)) (decomposes to anhydrous)
  • octahydrate: 102 °C (216 °F) (decomposes to heptahydrate)
Boiling point 710 °C (1,310 °F; 983 K)
  • decomposes (anhydrous)
  • dehydration above 850 °C (1,560 °F) produces SrO
2.25 g/100 g
Basicity (pKb)
  • 1st: 0.3
  • 2nd: 0.83
−40.0×10−6 cm3/mol
Structure
Orthorhombic
Pmc21 [26]
mm2
a = 3.997 Å, b = 6.078 Å, c = 10.072 Å
α = 90°, β = 90°, γ = 90°
244.677 Å3
4
Thermochemistry
−959.0 kJ⋅mol−1
Enthalpy of fusion (ΔfH⦵fus)
 23 kJ⋅mol−1
Hazards
NFPA 704 (fire diamond)
NFPA 704 four-colored diamond
1
0
1
Related compounds
Other anions
Other cations
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
X markN verify (what is checkYX markN ?)
Infobox references

Strontium hydroxide, Sr(OH)2, is a caustic alkali composed of one strontium ion and two hydroxide ions. It is synthesized by combining a strontium salt with a strong base. Sr(OH)2 exists in anhydrous, monohydrate, heptahydrate, and octahydrate form.

This page is issued from Wikipedia. The text is available under Creative Commons Attribution-Share Alike 4.0 unless otherwise noted. Additional terms may apply for the media files.