What is CHEAQS?

CHEAQS Next is a computer program for calculating CHemical Equilibria in AQuatic Systems. You supply input data, the program calculates the chemical speciation for you. CHEAQS Next is free.


Note: there are currently two versions available: a 32-bit version which has all of above features implemented except for the MSA-model; and a 64-bit version which includes the MSA-model and several other new features, but not all features of the 32-bit version yet. See the Download page for details.


periodic table

CHEAQS Next comes with a large database. Documentation is available for each equilibrium reaction in the database so you can always trace the source of an equilibrium reaction. In the periodic table on the right, you can see (in green) which elements are covered in CHEAQS Next' database. The database contains: