POTASSIUM BICARBONATE KHCO3

POTASSIUM BICARBONATE KHCO3

Properties 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:
2 KOH (conc.) + ЕO2 = K2ЕO3 + H2O (E = C, S),
KOH + CO2 = KHCO3 ↓ (in ethanol).
K2CO3 + H2O + CO2 = 2 KHCO3 (30-40° C).

The chemical reactions with potassium bicarbonate KHCO3:
2 KHCO3 = K2CO3 + CO2 + H2O (100—400° C).
KHCO3 (diluted) + 6 H2O = [K(H2O)6]+ + HCO3-,
HCO3- + H2O ↔ H2CO3 + OH-; рKO = 7,63.
KHCO3 + HCl (diluted) = KCl + CO2↑ + H2O.
KHCO3 + KOH (conc.) = K2CO3 + H2O.
6 KHCO3 (conc.) + 3 Cl2 = KClO3 + 5 KCl↓ + 6 CO2 ↑ + 3 H2O.
KHCO3 + SO2 = KHSO3 + CO2 ↑.
4 KHCO3 + 2 CuSO4 = Cu2CO3(OH)2 ↓ + 2 K2SO4 + 3 CO2 ↑ + H2O (boiling)