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When hydrogen gas passed over heated cupric oxide, the hydrogen is oxidized and displaces copper from the copper oxide as metallic copper, because hydrogen is higher than copper in the electromotive series. Water vapor is also produced by the reaction.

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11y ago
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5mo ago

When hydrogen gas is passed over heated cupric oxide, it reduces the cupric oxide to copper metal and water. The reaction can be represented by the equation: CuO(s) + H2(g) → Cu(s) + H2O(g).

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Q: When hydrogen gas passed over heated cupric oxide?
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Cupric nitrate is initially blue when in its hydrated form. When heated, it will decompose to form copper oxide, turning black in color.


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