Complex Equilibria.

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Presentation transcript:

Complex Equilibria

Metal Complex Monodentate ligands, e.g., NH3 and Cl- 3+ 2-

Chelate complexes Bidentate ligands: (greek. χηλή (chēle): engl: crab, pol: kleszcze, szczypce kraba)

Chelate complexes Polydentate ligands (greek. χηλή (chēle): engl: crab, pol: kleszcze, szczypce kraba)

Metal-EDTA Complex

Chelate Complexes

The chelate effect

The chelate effect

The chelate effect Increase of diorder Increase of entropy S

The chelate effect Increase of diorder Increase of entropy S Gibbs-Helmholtz Equation

Chelate effect Ni

EDTA-Komplexe

The philosophy of conditional constants: Give equilibrium constants for cases deviating from the standard conditions for which the equilibrium constant of a single equilibrium is defined, i.e., give equilibrium constants for “complex conditions”