Question

Among the methods for extracting metals from their ores, i.e., 1. roasting a metal sulphide, 2. chemical reduction of a metal oxide, and 3. electrolysis, the preferred method depends on $E^{\circ }$ value for the reducing half-reaction:

$M^{n+}\left(aq\right)+n{e}^{-}\to M\left(s\right)$

What are the criteria of selection of a good reducing agent for extraction of metals?

Answer 1

Criteria of good reducing agents
1. It should be cheaper than the metal being produced.
2. It should be able to reduce the metal compounds to free metal in a pure form at a suitable temperature.
3. It should not combine with the metal being produced.