Answer:
The CO2 reacts with water to form carbonic acid (H2CO3), which dissociates to H+ and HCO3 -. Reaction of the carbonic acid with the mineral consumes most of the H+ and liberates equivalent amounts of cations (Mg2+) and bicarbonate (HCO3 -), which react to form the solid carbonate mineral magnesite (MgCO3).
Explanation:
