Study of Metal-1,10-Phenanthroline Complex Equilibria by Potentiometric Measurements

Figure 2

The potentiometric titration curves of Phen with Sc(III), Y(III), and La(III) in 0.1 M KNO₃ at 25°C. (1 : 1) Sc(III) : Phen (𝑇_Sc = 9.668 × 10⁻² M, 𝑇_Phen = 9.668 × 10⁻² M), (1 : 1) Y(III) : Phen (𝑇_Y = 1.040 × 10⁻¹ M, 𝑇_Phen = 1.040 × 10⁻¹ M), (1 : 1) La(III) : Phen (𝑇_La = 9.180 × 10⁻², 𝑇_Phen = 9.180 × 10⁻² M).