Mathematical relationships and an analytical apparatus to quantify electron flow through a soil suspension were developed and discussed. Suspensions of two soils, synthetic ferrihydrite and partridgeite, and naturally occurring manganite-hematite mineral were titrated with electrons in this study. The Eh, pH, and current flow through the suspensions were continuously monitored. A portion of the suspensions was drawn after every 24 h, filtered, and the concentrations of Fe and Mn were measured using an atomic absorption spectrometer.The electron titration of the experimental soils did not depict buffering regions that could be assigned to a thermodynamically known Mn solid phase. Maghemite and goethite minerals in the experimental soils reduced between pe+pH of 13.6 and 13.2. Reduction of the synthetic partridgeite mineral poised pe=pH approximately at 14.7. The suspensions of manganite-hematite mixture buffered pe+pH first approximately at 14.8 and later at 13.2. Redox potential of freshly prepared ferrihydrite suspensions poised approximately at pe+pH of 14.5 and decreased with aging.The concentrations of Fe and Mn in the experimental soils and manganite-hematite mineral suspensions were increased with the passage of current.