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Reactions with Solids:

For solids, like for aqueous complexes, the logK°-value for the formation reaction is needed. Note that this is the inverse of the solubility product, i.e.: logKsp = − logKf

The state of the solid is indicated at the end of the name: “(cr)” or “(c)” indicates crystalline; “(am)” amorphous; “(s)” solid (unknown crystallinity), etc.

The concentration of a solid is equivalent to that of an aqueous species (mols of solid in a litre of aqueous solution).

Examples:

Precipitation:

Ag+ + Cl = AgCl(c)

line in logK-file:

AgCl(c);9.75;;;Ag+;1;;;Cl-;1;;;;;;;0;cerargyrite Wateq4F

Hydrolysis:

2 Bi3+ + 3H2O = Bi2O3(s) + 6H+

line in logK-file:

Bi2O3(s);-6.92;;;Bi 3+;2;H+;-6;H2O;3;;;;;;;-6;76Bae/Mes

Redox:   for example, the formation of magnetite,

3 Fe3+ + e− + 4 H2O = 8 H+ + Fe3O4(c)

line in database:

Fe3O4(c);1.968;;;Fe 3+;3;H+;-8;e-;1;H2O;4;;;;;-8;90Hem