A redox titration is performed to investigate iron content in an alloy sample. The potential of titration is monitored against a standard hydrogen electrode at 25 °C. All materials needed for redox titration were prepared accordingly. The half reactions involved in his experiment are: Fe3+ + e ̄ → Fe2+ E° = 0.771 V I3 ̄ + 2e ̄ → 3I ̄ E° = 0.535 V a) Construct a balanced titration equation. b) Assess the E° for this redox reaction. c) Depict whether the name of pH indicator that could be used to determine the endpoint of this titration.
A redox titration is performed to investigate iron content in an alloy sample. The potential of titration is monitored against a standard hydrogen electrode at 25 °C. All materials needed for redox titration were prepared accordingly. The half reactions involved in his experiment are:
Fe3+ + e ̄ → Fe2+ E° = 0.771 V
I3 ̄ + 2e ̄ → 3I ̄ E° = 0.535 V
a) Construct a balanced titration equation.
b) Assess the E° for this redox reaction.
c) Depict whether the name of pH indicator that could be used to determine the endpoint of this
titration.
d) Given a 25 mL portion of 0.5 M Fe3+ was titrated with 1 M titrant. Calculate the volume
of titrant required to reach equivalence point.
e) Evaluate the cell potential at this point if over-titrated by 2.50 mL.
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