268. A mixture of hydrochloric and monochloroacetic acids was dissolved in acetone and titrated potentiometrically with 0.1 N alcohol solution of KOH (K=0.9125). Construct titration curves in coordinates E from V and determine the concentration of acids (in g / l), if 50 ml of these acids were taken for analysis and the following results were obtained during titration:
VKOH, ml 3.0 3.2 3.4 3.6 3.8 4.0 4.2 4.4 4.6 4.8 5.0 5.2 5.4 5.6 5.8 6, 0
E, mV 432 444 466 580 624 640 650 652 653 655 660 670 685 770 795 800

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