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Complex formation and hydrolysis:

Example of complex formation reaction:

   Fe3+ + edta4− = Fe(edta)

Line in the logK-file:

FeEDTA-;25.1;;;Fe 3+;1;;;EDTA 4-;1;;;;;;;0;Smith&Martell

Hydrolysis reactions can not be entered as complexation reactions with OH: they must be re-written, if needed, in terms of water and H+. For example:

Ni2+ + 3 H2O = Ni(OH)3 + 3 H+

Line in logK-file:

Ni(OH)3-;-31;;;Ni 2+;1;H+;-3;H2O;3;;;;;;;-3

See notes on water.