RUBIDIUM PEROXIDE Rb2O2

Properties Rubidium peroxide Rb2O2:

White (with a admixture of RbO2 - yellow). Thermally stable, melting without decomposition. Extremely sensitive to O2 and CO2 of air. Ion has the structure of (Rb+)2 (O2-2). Completely decomposed by water, acids. Exhibits redox properties.

 

Obtaining rubidium oxide Rb2O2:

4 Rb + O2 = 2 Rb2O (in the cold), Rb →(O2) Rb2O2 →(O2), (time) RbO2↓ (-50° C, in the liquid NH3).

RbO2 (-O2)→(400-800° C) Rb2O2 (-O2)→(t>1010°) C Rb2O,

2 RbO2 = Rb2O2 + O2 (290° C, vacuum).

 

Сhemical reactions with rubidium oxide Rb2O2:

2 Rb2O2 = 2 Rb2O + O2 (t>1010° C).

Rb2O2 + 2 H2O = 2 RbOH + H2O2 (0° C),

2 Rb2O2 + 2 H2O (hot) = 4 RbOH + O2↑.

Rb2O2 + 2 HCl (diluted, cold) = 2 RbCl + H2O2,

2 Rb2O2 + 2 H2SO4 (diluted, hot) = 2 Rb2SO4 + 2 H2O + O2↑.

Rb2O2 + O2(air) = 2 RbO2 (normal temp.).

2 Rb2O2 + 2CO2 = 2 Rb2CO3 + O2, Rb2O2 + CO = Rb2CO3 (normal temp.).

5 Rb2O2 + 8 H2SO4 (diluted) + 2 RbMnO4 = 5 O2↑ + 2 MnSO4 + 6 Rb2SO4 + 8 H2O.

 

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