Since scaling, corrosion, and degassing pose negative effects on a plethora of industrial applications, many different computer tools (e.g., EQ3NR , MINTEQA2 / Visual Minteq , PHREEQC , Reaktoro , the extended UNIQUAC model by García et al. and the Søreide and Whitson's modified Peng-Robinson equation of state for prediction of gas solubilities in brine as a few relevant examples) have been developed to describe mathematically and predict these issues under variable conditions. In the present work, PHREEQC and Reaktoro are used due to their availability (freeware / open source) and widespread usage across different disciplines (e.g., environment/ground water, petroleum, energy, etc.) for calculations involving interactions and equilibria in systems containing gases and aqueous solutions with different electrolytes. For PHREEQC, several validation studies [10]- have been carried out in the context of different applications. While individual and binary-pairs gas solubilities have been calculated with PHREEQC and validated against experiments, modelling the mutual solubility of ternary gas mixtures including bubble point prediction and validation against experimental data is very limited.