Department of Earth Sciences, University of Bristol
Chemistry for Earth Sciences
Prof. D.M. Sherman
Lecture 10: Oxidation-Reduction Equilibria
Several geochemically important elements (S, O, C, N, Fe, Mn) can exist in more than one oxidation state over the
range of conditions in the Earth's crust.
Oxidation-reduction equilibria are the primary means by which biological processes interact with geochemistry.