The HCl solution to be analyzed was diluted with water in a volumetric flask to 100.0 ml, and a 20.0 ml aliquot was titrated potentiometrically with 0.1000 M NaOH. Construct titration curves in the coordinates pH - V and ∆рН / ∆V - V and determine the mass (mg) of HCl in solution

V(NaOH), ml 1.50 1.80 1.90 1.95 1.98 2.00 2.02 2.05 2.10
pH 2.64 3.05 3.36 3.64 4.05 6.98 9.95 10.53 10.65

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