An auxiliary reducing agent represents an easily oxidized metal such as Zn, Ag, Sn, or Cd that is part of prereduction.
An auxiliary oxidizing agent will oxidize the analyte and in the process be reduced as part of the preoxidation stage.
Answer each of the following questions based on the following half reactions:
HALF REACTIONS Eo (V)
Cl2 (g) + 2 e – → 2 Cl – (aq) + 1.36
l2 (g) + 2 e – → 2 l – (aq) + 0.535
Pb2+ (aq) + 2 e – → Pb (s) - 0.126
V2+ (aq) + 2 e – → V (s) - 1.18
a) Which is the strongest oxidizing agent?
b) Which is the strongest reducing agent?
c) Will I – (aq) reduce Cl2 (g) to Cl – (g)?