RUBIDIUM CARBONATE Rb2CO3

Properties Rubidium carbonate Rb2CO3:

White, during calcination decomposes, melts only pressurized CO2. Sensitive to moisture and CO2 of air. Very soluble in water (strong hydrolysis of the anion), creates a highly alkaline environment. Decomposes by acids. Participates in exchange reactions.


Molar mass g/mol 230.94
Melting point °C 873

Obtaining rubidium carbonate Rb2CO3:

4 RbO2 + 2CO2(humid) = 2Rb2CO3 + 3O2 (normal temp.),

2 RbO2 + CO = Rb2CO3 + O2 (30-40° C).

2 RbOH (conc.) + CO2 = Rb2CO3 + H2O.


Сhemical reactions with rubidium carbonate Rb2CO3:

Rb2CO3 = Rb2O + CO2 (t>900° C, vacuum).

Rb2CO3·1,5H2O = Rb2CO3 + 1,5H2O (t>190° C).

Rb2CO3(diluted) + 12H2O = 2[Rb(H2O)6]+ + CO32-,

CO32- + H2O ↔ HCO3 - + OH -.

Rb2CO3 + 2HCl (diluted) = 2RbCl + CO2↑ + H2O.

Rb2CO3 + 2HClO4 (conc., cold) = 2RbClO4↓ + CO2↑ + H2O.

Rb2CO3 + H2O + CO2 (170-180° C) ↔ 2RbHCO3.

Rb2CO3 + Ca(OH)2 (saturated) = 2RbOH + CaCO3↓.


 

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