CESIUM CARBONATE Cs2CO3Properties of cesium carbonate Cs2CO3: White, at calcination decomposes, melts under pressurized CO2. Sensitive to moisture and CO2 of air. Very soluble in water (strong hydrolysis of the anion), creates a highly alkaline environment. Decomposed by acids. Participates in exchange reactions.
Obtaining cesium carbonate Cs2CO3: Cs2O + CO2(humid) = Cs2CO3 (normal temp.), Cs2O + H20 + 2 CO2 = 2 CsHCO3 (normal temp.). CsOH (conc.) + CO2 = Cs2CO3 + H2O.
Сhemical reactions with cesium carbonate Cs2CO3: Cs2CO3 = Cs2O + CO2 (620 - 1000°C, vacuum). Cs2CO3x3.5H2O = Cs2CO3 + 3.5 H2O, (150-160°C). Cs2CO3 (diluted) + 12 H2O = 2[Cs(H2O)6]+ + (CO3)2-, (CO3)2- + H2O = HCO3- + OH-, pK0 = 3.67 Cs2CO3 + 2HCl(diluted) = 2CsCl + CO2↑+ H2O. Cs2CO3 (saturated) + 2 HClO4(conc. cold) = 2CsClO4↓ + CO2↑ + H2O. Cs2CO3 + H2O + CO2 -> 2 CsHCO3 (20°C), 2 CsHCO3 -> Cs2CO3 + H2O + CO2 (170-180°C). Cs2CO3 + Ca(OH)2 (saturated) = 2CsOH + CaCO3↓. |
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Metalloids are elements that display properties of metals and non metals.