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Question

Match the following given the reaction below:
CuO+H2Cu+H2O

A
CuO
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B
H2
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C
Cu
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D
H2O
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Solution

+2Cu2O +0H2 0 Cu + +1H22O
  • Oxidation state of copper (Cu) decreases from +2 to zero so copper (Cu) is reduced species.
  • Oxidation state of hydrogen in H2O is +1 which increased from zero in H2. So, H2O is the oxidized species.
  • CuO is the oxidizing agent because the oxidation state of copper decreases as the product - Cu is formed.
  • H2 is the reducing agent because the oxidation state of hydrogen increases as the product H2O is formed

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