Final answer:
The question seeks a free PC software for calculating the degree of saturation and activity products in chemistry. Although the provided references do not directly match this request, open-source equilibrium modeling software or educational tools for chemical calculations may serve this purpose. Students might also utilize free online calculators for related scientific computations.
Step-by-step explanation:
The question refers to PC software that can be used for calculating the degree of saturation and activity products without any cost. While the provided references do not point directly to such software, students looking for free software for chemical calculations might want to explore options such as open-source equilibrium modeling software or educational websites offering chemical calculation tools. To calculate values of reaction quotients and equilibrium constants using concentrations and pressures, and to relate the magnitude of an equilibrium constant to properties of the chemical system, such a software must encompass the relevant chemical principles and equations.
For example, in the context of environmental science and ecology, the Population viability analysis software mentioned or the Ecological Methodology software-Krebs may provide tools for specific ecological and environmental calculations, but they may not directly address chemical saturation and activity products. When using a PC for these calculations, students can also benefit from a variety of online calculators for computing percentiles and other statistical measures that might be of use in broader scientific research.