What is the primary purpose of converting an analyte to a single oxidation state in redox titration?

Which of the following statements correctly differentiates auxiliary reducing agents from auxiliary oxidizing agents?

In a redox titration, zinc amalgam is used to reduce an analyte. What happens to the zinc during this process?

How does peroxidisulfate function as an auxiliary oxidizing agent in redox titrations?

Determine the change in oxidation state when manganese(II) ion is oxidized to permanganate ion.