Consider the titration of 100.0 mL of 0.010 0 M Ce⁴⁺ in 1 M HClO₄ by 0.040 0 M Cu⁺ to give Ce³⁺ and Cu²⁺, using Pt and saturated Ag | AgCl electrodes to find the end point. 

(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 Cu⁺: 1.00, 12.5, 24.5, 25.0, 25.5, 30.0, and 50.0 mL. Sketch the titration curve.