Chapter 17, Problem 17.141MP

Consider the redox titration of 100.0 mL of a solution of 0.010 M Fe²⁺ in 1.50 M H₂SO₄ with a 0.010 M solution of KMnO₄, yielding Fe³⁺ and Mn²⁺. The titration is carried out in an electrochemical cell equipped with a platinum electrode and a calomel reference electrode consisting of an Hg₂Cl₂/Hg electrode in contact with a saturated KCl solution having [Cl^–] = 2.9 M. Using any data in Appendixes C and D, calculate the cell potential after addition of (a) 5.0 mL, (b) 10.0 mL, (c) 19.0 mL, and (d) 21.0 mL of the KMnO₄ solution.