Will hydrogen gas displace copper in a copper(II) chloride solution?

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Discussion Overview

The discussion centers on whether hydrogen gas can displace copper from a copper(II) chloride solution, exploring the reactivity of hydrogen compared to copper. It involves theoretical considerations based on the reactivity series and chemical reactions.

Discussion Character

  • Debate/contested

Main Points Raised

  • Some participants reference the reactivity series, suggesting that copper is below hydrogen, which implies that hydrogen should be able to displace copper from the solution.
  • One participant questions whether the comparison is between copper and hydrogen or hydrogen gas (H2), indicating a potential misunderstanding of the reactivity context.
  • Another participant notes that gases are often considered more reactive than solids, raising a point about the general reactivity of different states of matter.
  • One participant proposes a specific reaction involving heating solid CuCl2 and passing H2 gas over it, suggesting that this would lead to the formation of copper and hydrochloric acid.

Areas of Agreement / Disagreement

Participants express differing views on the reactivity of hydrogen relative to copper, with some agreeing that hydrogen is more reactive while others seek clarification on the comparison being made. The discussion remains unresolved regarding the displacement reaction.

Contextual Notes

There are unresolved assumptions about the conditions under which hydrogen might displace copper, including the state of the reactants and the specific reaction conditions required.

Who May Find This Useful

Individuals interested in chemical reactivity, displacement reactions, or the properties of gases versus solids may find this discussion relevant.

reventon_703
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According to the reactivity series, copper is below hydrogen.
In theory, hydrogen gas should be able to displace copper in a copper(II) chloride solution should the gas be bubbled into the solution, is this true?
 
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Is copper below hydrogen or hydrogen gas (H2)?
 
Touche... it is hydrogen.
But how can I find out if hydrogen gas is more reactive than copper? Gases are often more unstable and reactive than solids is it not?
 
I agree that Hydrogen is more reactive than Copper. Heat solid CuCl2 (below its temperature of decomposition) and pass H2 gas over it. I would expect:

CuCl2 + H2 --> Cu + 2 HCl
 

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