Reactions
It dissolves in water to give a mildly alkaline solution. It is insoluble in acetone and alcohols.
Ammonium bicarbonate decomposes above about 36 °C into ammonia, carbon dioxide, and water in an endothermic process and so causes a drop in the temperature of the water:
- NH4HCO3 → NH3 + H2O + CO2.
When treated with acids, carbon dioxide is also produced:
- NH4HCO3 + HCl → NH4Cl + CO2 + H2O.
Reaction with base produces ammonia.
It reacts with sulfates of alkaline-earth metals to precipitating their carbonates:
- CaSO4 + 2 NH4HCO3 → CaCO3 + (NH4)2SO4 + CO2 + H2O.
It also reacts with alkali metal halides, giving alkali metal bicarbonate and ammonium halide:
- NH4HCO3 + NaCl → NH4Cl + NaHCO3;
- NH4HCO3 + KI → NH4I + KHCO3;
- NH4HCO3 + NaBr → NH4Br + NaHCO3.
Read more about this topic: Ammonium Bicarbonate
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