What happens when carbon dioxide is passed through ammonia?

Ammonium carbamate Aqueous ammonia can be used to capture CO2 from flue gas of coal-fired power plant with quick reaction rate, high removal efficiency, and high loading capacity of CO2. It is thought to be a promising technology. read more

Ammonium carbamate (NH2COONH4) is formed by the reaction of carbon dioxide and ammonia in the dry condition under room temperature and a pressure of 1 atm. It is very soluble in water; therefore, under moist air the hydration product of ammonium carbonate ((NH4)2CO3) is produced under room temperature. read more

Anyways, carbon dioxide passing into solution will form carbonic acid, H2CO3 (essentially, it's a water molecule added to the initial carbon dioxide molecule). This then dissociates like any other acid, forming HCO3-, a hydrogencarbonate ion. read more

Carbon dioxide present in exhaled air is blown into a flask containing an indicator sensitive to small changes of pH in the appropriate region of the pH scale, and the consequent colour changes observed and recorded. The equation for the reaction between carbon dioxide and water may be introduced for appropriate students. read more