Mineral precipitations at hot sulfur springs

At 45°C a maximum of about 6.5 mg 02 can dissolve in one liter of water. The gas solubilities given in Table 44 first must be recalculated to the respective temperatures (T)., for 0 °C e.g.  

The calculated value would be correct for 100 vol% 02. However, there are only 21 vol% in the atmosphere, 67.6 mg/L so that value must be multiplied by 0.21 and one gets 14.19 mg/L 02-solubility at 0°C. 

using REACTION 1, 2, 3, 4, 5, 6, and 6.5 mg/L 02 (converted into mol/L) are added. For C02, equilibrium with the atmospheric partial pressure can be defined simply by using the key word EQUILIBRIUMPHASES, since all the subsequent reactions depend only on the diffusion of the C02 and its dissociation in water. Contrary to redox reactions with oxygen both processes are fast reactions, hence can be described by equilibrium reactions, neglecting kinetics. 

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