Which of the statements below are true for the titration of Fe²⁺ with standard Ce⁴⁺?
I The indicator electrode potential before the addition of Ce⁴⁺ solution is calculated using the Fe³⁺ half-reaction after calculating the equilibrium concentrations of Fe³⁺ and Fe²⁺ in solution.
II Before the equivalence point,the indicator electrode potential is calculated using the Fe³⁺ half-reaction because only [Fe³⁺] and [Fe²⁺] are known.
III At the equivalence point,the indicator potential is the average of E^o for Fe³⁺ and Ce⁴⁺.
IV After the equivalence point,the indicator electrode potential is calculated using the Ce⁴⁺ half-reaction because only [Ce⁴⁺] and [Ce²⁺] are known.

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The Answer of Which of the statements below are true for the titration of Fe²⁺ with standard Ce⁴⁺? I The indicator electrode potential before the addition of Ce⁴⁺ solution is calculated using the Fe³⁺ half-reaction after calculating the equilibrium concentrations of Fe³⁺ and Fe²⁺ in solution. II Before the equivalence point,the indicator electrode potential is calculated using the Fe³⁺ half-reaction because only [Fe³⁺] and [Fe²⁺] are known. III At the equivalence point,the indicator potential is the average of E^o for Fe³⁺ and Ce⁴⁺. IV After the equivalence point,the indicator electrode potential is calculated using the Ce⁴⁺ half-reaction because only [Ce⁴⁺] and [Ce²⁺] are known. A)II and IV B)II,III,and IV C)I,III,and IV D)I,II,and IV E)I,II,III,and IV

Which of the Statements Below Are True for the Titration