2.1. Dissolution of calcium carbonate
According to [7], the kinetic of dissolution of calcium carbonate is a function of the concentration of the
various carbonate species in the solution and, therefore, a function of the partial pressure of carbon dioxide and
pH. A model for the dissolution of calcium carbonate was developed in [8]. According to this model, depending
on the pH, there are four different ways in which the dissolution of calcium carbonate occurs. At pH values lower
than 3.5 the speed of the reaction is proportional to the concentration of H3O+ according to reaction path 1:
CaCO3 + H3O+ ↔ Ca2+ + HCO−
3 + H2O