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Sites of interest

Academic Software Free downloads including .Equilibria in Aqueous Solutions, a collection of utility programs for matters relating to ionic strength effects, salinity effects, temperature effects, activity coefficients, O₂ solubility and much more (view contents page)

Aqua solutions software

Electrolytes:Calculation of activity coefficients, osmotic coefficients, water activity for aqueous electrolyte solutions

Acid-base equilibria in electrolyte solutions and sea water

Calculation of O₂ solubility in water, electrolyte solutions, natural fluids and seawater as a function of temperature, concentration, salinity, altitude, external pressure, humidity

Prediction of temperature dependence of log K values using various thermodynamic models

JESS A powerful research tool for modelling chemical speciation in complex aqueous environments. It is designed to solve problems requiring expert knowledge of solution chemistry. It currently comprises over 250 programs, 2000 subroutines and 234,000 lines of Fortran code

A speciation program derived from HALTAFALL. Now available as a Windows application, WINSGW, for free download.

• calculate equilibrium compositions for complexation reactions (up to 15 components and 300 species)
• calculate with up to 31 solid phases
• calculate with Ionic Strength models according to: Debye-Hückel, Extended Debye-Hückel, Davies, Güntelberg, Pitzer
• calculate equilibrium compositions at different temperatures
• recalculate equilibrium constants from one temperature to another using DH for the reaction
• handle up to five different solid phases with surface complexation. The electrostatic contributions can be accounted for with the following models: Constant Capacitance Model, Extented Constant Capacitance Model, Diffuse Layer Model, Stern Model,Triple Layer Model, Three Plane Model
• calculate with Donnan equilibrium in fibre suspensions