Rubidium oxide

Rubidium oxide
Rubidium oxide
General
Systematic ; name	Rubidium oxide
Chem. formula	Rb 2 o
Rat formula	Rb 2 o
Physical properties
condition	Yellowish white crystals
Molar mass	186.94 g / mol
Density	3.72 g / cm³
Thermal properties
T. melt.	505 ° C
Like heat resistant.	77.57 J / (mol · K)
Enthalpy of Education	279.1 kJ / mol
Classification
Reg. CAS number	18088-11-4
PubChem
Reg. EINECS number
ChemSpider

Rubidium oxide is a binary inorganic compound of rubidium metal with oxygen, having the formula Rb ₂ O and belonging to the class of basic oxides . Forms yellowish-white crystals.

Content

1 Receiving
2 Physical properties
3 Chemical properties
4 Application
5 Literature

Getting

The slow interaction of metallic rubidium with oxygen in the cold:

{\mathsf {4Rb+O_{2}\ {\xrightarrow {\ }}\ 2Rb_{2}O}}

{\ displaystyle {\ mathsf {4Rb + O_ {2} \ {\ xrightarrow {\}} \ 2Rb_ {2} O}}}

The decomposition of rubidium hydroxide :

{\mathsf {2Rb+2RbOH\ {\xrightarrow {400^{o}C}}\ 2Rb_{2}O+H_{2}O\uparrow }}

{\ displaystyle {\ mathsf {2Rb + 2RbOH \ {\ xrightarrow {400 ^ {o} C}} \ 2Rb_ {2} O + H_ {2} O \ uparrow}}}

The decomposition of rubidium peroxide :

{\mathsf {2Rb_{2}O_{2}\ {\xrightarrow {1000^{o}C}}\ 2Rb_{2}O+O_{2}\uparrow }}

{\ displaystyle {\ mathsf {2Rb_ {2} O_ {2} \ {\ xrightarrow {1000 ^ {o} C}} \ 2Rb_ {2} O + O_ {2} \ uparrow}}}

Vacuum decomposition of rubidium carbonate :

{\mathsf {Rb_{2}CO_{3}\ {\xrightarrow {900^{o}C}}\ Rb_{2}O+CO_{2}\uparrow }}

{\ displaystyle {\ mathsf {Rb_ {2} CO_ {3} \ {\ xrightarrow {900 ^ {o} C}} \ Rb_ {2} O + CO_ {2} \ uparrow}}}

Physical Properties

Rubidium oxide is a light yellow crystals of cubic syngony , space group F m3m , cell parameters a = 0.6756 nm, Z = 4, structure type CaF ₂ .

When heated above 150 ° C, the crystals pass into the cubic phase and become yellow-orange.

Chemical Properties

When heated, decomposes:

{\mathsf {2Rb_{2}O\ {\xrightarrow {400^{o}C}}\ Rb_{2}O_{2}+2Rb}}

{\ displaystyle {\ mathsf {2Rb_ {2} O \ {\ xrightarrow {400 ^ {o} C}} \ Rb_ {2} O_ {2} + 2Rb}}}

This reaction proceeds without heating under the influence of light.

Interacts with water :

{\mathsf {Rb_{2}O+H_{2}O\ {\xrightarrow {\ }}\ 2RbOH}}

{\ displaystyle {\ mathsf {Rb_ {2} O + H_ {2} O \ {\ xrightarrow {\}} \ 2RbOH}}}

It interacts with acid oxides to form a salt :

{\mathsf {Rb_{2}O+CO_{2}\ {\xrightarrow {\ }}\ Rb_{2}CO_{3}}}

{\ displaystyle {\ mathsf {Rb_ {2} O + CO_ {2} \ {\ xrightarrow {\}} \ Rb_ {2} CO_ {3}}}}

It interacts with acids to form salt and water :

{\mathsf {Rb_{2}O+2HCl\ {\xrightarrow {\ }}\ 2RbCl+H_{2}O}}

{\ displaystyle {\ mathsf {Rb_ {2} O + 2HCl \ {\ xrightarrow {\}} \ 2RbCl + H_ {2} O}}}

Reacts with liquid ammonia :

{\mathsf {Rb_{2}O+NH_{3}\ {\xrightarrow {-50^{o}C}}\ RbNH_{2}\downarrow +RbOH}}

{\ displaystyle {\ mathsf {Rb_ {2} O + NH_ {3} \ {\ xrightarrow {-50 ^ {o} C}} \ RbNH_ {2} \ downarrow + RbOH}}}

Application

The catalyst in organic synthesis.

Literature

Lidin R.A. and other Chemical properties of inorganic substances: Textbook. manual for universities. - 3rd ed., Rev. - M .: Chemistry, 2000 .-- 480 p. - ISBN 5-7245-1163-0 .
Ripan R., Chetyanu I. Inorganic chemistry. Chemistry of metals. - M .: Mir, 1971. - T. 1. - 561 p.
Chemistry Handbook / Editorial: Nikolsky B.P. et al. - 2nd ed., rev. - M.-L.: Chemistry, 1966. - T. 1. - 1072 p.
Chemistry Handbook / Editorial: Nikolsky B.P. et al. - 3rd ed., rev. - L .: Chemistry, 1971. - T. 2. - 1168 p.
Chemical Encyclopedia / Editorial Board: Knunyants I.L. et al. - M .: Soviet Encyclopedia, 1995. - T. 4. - 639 p. - ISBN 5-82270-092-4 .

Rubidium oxide
General
Systematic name	Rubidium oxide
Chem. formula	Rb ₂ o
Rat formula	Rb ₂ o
Physical properties
condition	Yellowish white crystals
Molar mass	186.94 g / mol
Density	3.72 g / cm³
Thermal properties
T. melt.	505 ° C
Like heat resistant.	77.57 J / (mol · K)
Enthalpy of Education	279.1 kJ / mol
Classification
Reg. CAS number	18088-11-4
PubChem
Reg. EINECS number
ChemSpider