Consider the titration of 25.0 mL of 0.050 0 M Sn2+ with 0.100 M Fe3+ in 1 M HCl to give
Fe2+ and Sn4+, using Pt and calomel electrodes.
(a) Write a balanced titration reaction.
(b) Write two half-reactions for the indicator electrode.
(c) Write two Nernst equations for the cell voltage.
(d) Calculate E at the following volumes of Fe3+: 1.0, 12.5, 25.0, 30.0 and 50.0 mL. Sketch
the titration curve

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