ABSTRACT
The law of mass action can be observed in a range of dissociation, redox, and gas solubility reactions. The thermodynamic approach presented in Chapter 2 is useful to quantify these various reactions and to predict speciation, mineral saturation, gas partial pressures, and other geochemical insights. This chapter looks at the common mineral-solute-gas reactions in groundwater, their thermodynamic basis, and how they contribute to the geochemistry of water.
