Analytical Chem istry - DePauw University

484 Analytical Chemistry 2.01.6(a)(b)1.61.41.4E (V)1.21.0E (V)1.21.00.80.80.60 20 40 60 80 100Volume of Ce 4+ (mL)0.60 20 40 60 80 100Volume of Ce 4+ (mL)(c)1.6(d)1.61.41.4E (V)1.2E (V)1.21.01.00.80.80.60 20 40 60 80 100Volume of Ce 4+ (mL)0.60 20 40 60 80 100Volume of Ce 4+ (mL)(e)1.6(f)1.61.41.4E (V)1.21.0E (V)1.21.00.80.80.60 20 40 60 80 100Volume of Ce 4+ (mL)0.60 20 40 60 80 100Volume of Ce 4+ (mL)Figure 9.37 Illustrations showing the steps in sketching an approximate titration curve for the titration of 50.0mL of 0.100 M Fe 2+ with 0.100 M Ce 4+ in 1 M HClO 4 : (a) locating the equivalence point volume; (b) plottingtwo points before the equivalence point; (c) plotting two points after the equivalence point; (d) preliminaryapproximation of titration curve using straight-lines; (e) final approximation of titration curve using a smoothcurve; (f) comparison of approximate titration curve (solid black line) and exact titration curve (dashed red line).See the text for additional details.