[Mchabe]

Hi. What could be the correct approach to calculate the concentrations of H⁺, SO_2(aq), HSO₃^-, SO2₃^-, CO_2(aq), HCO₃^-, CO₃^2-, Ca²⁺, CaSO₃.1/2H₂O and CaSO₄.2H₂O in an experiment where SO₂ is absorbed into limestone slurry. I am particular interested in the concentrations in all five cases of the experiment, namely: (1) Case 1: when the only solid in the slurry is CaCO₃ (2) Case 2: when the two solids in the slurry are CaCO₃ + CaSO₃.1/2H₂O; (3) Case 3: when the two solids in the slurry are CaCO₃ +CaSO₄.2H₂O (4) Case 4: when the solids in the slurry are CaCO₃ + CaSO₃.1/2H₂O + CaSO₄.2H_²O; (5) Case 5: when the solids in the slurry are CaSO₃.1/2H₂O + CaSO₄.2H₂O.

Similar work has been done by: Pasiuk-Bronikowska, W., & Rudzinski, K. J. (1991). Absorption of SO2 into aqueous systems. Chemical Engineering Science, 46(9): 2281–2291.

http://www.sciencedirect.com/science/article/pii/000925099185126I

or

http://dx.doi.org/10.1016/0009-2509(91)85126-I

The difference is that Ca(OH)2 was used, instead of CaCO3. I do not understand the approach used in the article.

Regards
Mchabe