Consider the titration in Figure 15-2.

(a) Write a balanced titration reaction.

(b) Write two different half-reactions for the indicator electrode.

(c) Write two different Nernst equations for the cell voltage.

(d) Calculate E at the following volumes of Ce⁴⁺: 10.0, 25.0, 49.0, 50.0, 51.0, 60.0, and 100.0 mL. Compare your results with Figure 15-2.

Figure 15-2

1.4 1.3 1.2 1.1 Equivalence point (inflection point) 1.0 0.9 0.8- E= E, -E = E" (Fe| Fe") - E (S.C.E.) 0.7 0.6- 0.5 0.4 0.3 10 20 30 40 50 60 70 Vcet+ (mL) Potential (V vs. S.C.E.)