Question

Give chemical equation to show that hydrogen gas is passed over heated calcium

Answer 1

Answer:

When Hydrogen gas is passed over the heated copper oxide, both steam and copper are formed. The balanced chemical equation with the physical state for this reaction is given below. Cu O (s) + H2 (g) ===> heat ==> Cu (s) + H2O (g). n this process, Hydrogen is oxidized and Cu is reduced

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Answer 2

Chemical reaction is as follows $CuO + H2 ----- Cu + H2O$

* In question it is given that hydrogen gas is passed over calcium but it should be copper oxide

Explanation:

• When hydrogen gas is passed over heated copper oxide

$CuO + H2 ----- Cu + H2O$

• Copper oxide is losing its oxygen to form copper, where copper is reduced.
• Copper and steam are formed during this process.
• Here Hydrogen is oxidised to Water (Steam)
• And Copper oxide is reduced to form copper.
• This reaction is an example showing oxidation and reduction in the same reaction.
• Hence it is type of redox reaction.