POTASSIUM BICARBONATE KHCO3Properties potassium bicarbonate KHCO3: White, with moderate heating decomposes without melting. Stable in air. Have the structure (K)2(HCO3)2-2. Readily soluble in water (hydrolysis on the weak anion). Does not form Crystalline hydrates. Decomposes by acid, neutralized by alkalis. Participates in exchange reactions.
Obtaining potassium bicarbonate KHCO3: 2KOH (conc.) + EO2 = K2EO3 + H2O (E = C, S), KOH + CO2 = KHCO3↓ (in ethanol). K2CO3 + H2O + CO2 = 2KHCO3 (30-40° C). Сhemical reactions with potassium bicarbonate KHCO3: 2KHCO3 = K2CO3 + CO2 + H2O (100-400° C). KHCO3 (diluted) + 6H2O = [K(H2O)6]+ + HCO3-, HCO3- + H2O ↔ H2CO3 + OH-; KHCO3 + HCl (diluted) = KCl + CO2↑ + H2O. KHCO3 + KOH (conc.) = K2CO3 + H2O. 6KHCO3 (conc.) + 3Cl2 = KClO3 + 5KCl↓ + 6CO2↑ + 3H2O. KHCO3 + SO2 = KHSO3 + CO2↑. 4KHCO3 + 2CuSO4 = Cu2CO3(OH)2↓ + 2K2SO4 + 3CO2↑ + H2O (boiling). |
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