Atomistry » Rubidium » Chemical Properties » Rubidium peroxides
Atomistry »
  Rubidium »
    Chemical Properties  »
      Rubidium peroxides »

Rubidium peroxides

Three peroxides have been prepared by the action of excess of oxygen on the metal. The dioxide, Rb2O2, forms yellow needles melting about 600° C., and of density 3.65 at 0° C. Its heat of formation from the elements is about 107.6 Cal. The trioxide, Rb2O3, is produced by heating the metal with the theoretical proportion of oxygen, and is a black solid, melting below 500° C., and of density 3.53 at 0° C. It dissolves readily in water, forming hydrogen peroxide, and evolving oxygen. Its heat of formation from the elements is about 125.6 Cal. The tetroxide, Rb2O4, is formed as a yellowish-brown substance by the action of oxygen at reduced pressure on the metal, or as a brownish-black mass by the further oxidation of the dioxide. At ordinary pressure in an atmosphere of oxygen it melts between 600° and 650° C. to a dark brown liquid, but in vacuum decomposes at a lower temperature. Its heat of formation from the elements is 137.6 Cal.

Last articles

Zn in 7L0B
Zn in 7KZZ
Zn in 7KZL
Zn in 7L3O
Zn in 7L52
Zn in 7L6T
Zn in 7KZ7
Zn in 7L6R
Zn in 7KKM
Zn in 7KKQ
© Copyright 2008-2020 by atomistry.com
Home   |    Site Map   |    Copyright   |    Contact us   |    Privacy