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Chemistry

What do you observe when hydrogen is passed over heated copper oxide?

Metallurgy

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Answer

When hydrogen is passed over heated copper oxide (CuO), the black CuO changes to pink/brown Cu and H2O is released.

CuOblack+H2ΔCupink/brown+H2O\underset{\text{black}}{\text{CuO}} + \text{H}2 \xrightarrow{\Delta} \underset{\text{pink/brown}}{\text{Cu}} + \text{H}{2}\text{{O}}

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