11. Solution to Chemistry Problem

3. A mixture of hydrochloric and boric acids was titrated potentiometrically with 0.1000 M NaOH sequentially. Plot potentiometric titration curves in pH-V and ΔрН-ΔV coordinates, determine volumes V1 and V2 and calculate the concentration (g/L) of HCl and H3BO3 if 20.00 mL of the acid mixture was taken for analysis and the following data were obtained during titration:
V(NaOH), mL . 0 00 0.20 0.30 0.40 0.46 0.50 0.55 0.60 glycerol was added
pH 2.60 2.84 3.02 3.40 3.95 5.58 7.03 7.38
V(NaOH), mL . 0.80 1.00 1.20 1.40 1.45 1.50 1.55 1.60 1.70 pH 5.95 6.25 6.55 7.04 7.28 7.73 8.55 9.10 9.55