Chemistry - Metallurgy Question with Solution | TestHub

Question Explanation:

Reasons for complexity in the carbothermic reduction of tin oxide.

Concept:

Reaction intermediates, Vapor pressure of oxides.

Solution:

${\mathrm{SnO}}_2+\mathrm{Sn}\to 2\mathrm{SnO}(\mathrm{g})$ occurs at high temperatures, causing loss of tin. Also, the reduction involves SnO as an intermediate. SnC is not a stable species in these conditions.

Reaction 1: ${\mathrm{SnO}}_2+\mathrm{C}\to \mathrm{Sn}+{\mathrm{CO}}_2$ (Main reduction)

Reaction 2: $\mathrm{Sn}+{\mathrm{SnO}}_2\to 2\mathrm{SnO}$ (Side reaction forming volatile SnO )

Final Answer: Metallic Tin can react with ${\mathrm{SnO}}_2$ to form volatile SnO .