Redox titration

ON WHICH PRINCIPLE?

diagram presenting a curve, in ordiante E0 (potential in absolute value), in abscissa X (volume of titrant added), the curve has an increasing tendency with a point of inflexion O, which is the point of equivalence of the titration by oxidation-reductometry

This inflection point can be graphically estimated, according to the tangent method (taking the middle of the AB segment), and it is marked on the above graph by point O.