1. Thermal reduction method:
The copper oxide is heated to a certain temperature, for example, in a high-temperature furnace, to make it undergo a reduction reaction to reduce the copper oxide into copper.
Reaction equation:
2 copper oxide +2 copper oxide
Where (S) stands for solid and (G) stands for gas.
2. Chemical reduction method:
React copper oxide with reducing agent to make it undergo reduction reaction, and reduce copper oxide into copper.
Commonly used reducing agents are:
-Carbon:
Copper oxide is mixed with carbon black or graphite powder and heated to a high temperature to make it undergo a reduction reaction.
Reaction equation:
CuO(s) + C(s) Cu(s) + CO(g)
-Hydrogen:
Copper oxide reacts with hydrogen to make it undergo a reduction reaction.
Reaction equation:
Copper oxide+H2 copper+H2O
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Sodium sulfite:
Copper oxide reacts with sodium sulfite solution to make it undergo reduction reaction.
Reaction equation:
Copper oxide+sodium sulfate (aqueous solution)+H2O (aqueous solution) Copper (aqueous solution)+sodium sulfate (aqueous solution)+H2O (aqueous solution)
The above two methods are common ways to reduce copper oxide to copper, and the reduction reaction can be realized by choosing appropriate methods and conditions. It should be noted that the applicable conditions and reaction rates of different methods may be different, and the specific selection needs to be considered according to actual needs.