An Exact Method to Determine the Conductivity of Aqueous Solutions in Acid-Base Titrations

Figure 6

Titration plots of a Britton-Robinson solution, obtained after mixing 30.00 mL of a CH₃COOH 0.015 mol L⁻¹ aqueous solution with 30.00 mL of a H₃BO₃ 0.015 mol L⁻¹ aqueous solution, 30.00 mL aqueous solution of H₃PO₄ 0.015 mol L⁻¹, and 260 mL water, titrated with NaOH at 0.050 mol L⁻¹ concentration. (a) pH-metric plots: the markers represent the experimental recordings obtained (corrected through the efficiency of the cell as indicated in Section 2). The solid line represents the plot estimated (22) whereas the segmented line represents the , obtained from the fitted model. (b) Plot of buffer capacity with dilution (), estimated as , as a function of pH, for the Britton-Robinson solution. (c) Conductometric plot . The markers represent the experimental points obtained and the solid line represents the estimated plot with (23).

(a)

(b)

(c)