Cierragr6906 Cierragr6906
  • 14-06-2017
  • Chemistry
contestada

Which substance is reduced in this redox reaction? CuO(s) + H2(
g. → Cu(s) + H2O(l)

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scme1702
scme1702 scme1702
  • 22-06-2017
Reduction occurs when a chemical specie gains electrons or its valence number is reduced. In the case of this reaction, The valency of copper before this reaction is +2, the valency of oxygen is -2 and valency of hydrogen is 0. 
After the reaction, the valency of copper is 0, the valency of hydrogen is +1 and the valency of oxygen remains -2.
Therefore, Cu is reduced in this reaction.
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