Question

Why can copper metal not liberate hydrogen when reacting with dilute hcl?

Answer 1

AnsweR :-

A more reactive element can displace a less reactive element from its salt solution. The metals above hydrogen in the activity series react with dilute sulphuric acid and dilute hydrochloric acid to liberate hydrogen. The metals below hydrogen in the activity series cannot do that. Copper fall below hydrogen in series.

Answer 2

Because copper is less reactive than hydrogen.

Explanation:

Single displacement reaction is defined as the reaction in which more reactive metal displaces a less reactive metal from its chemical reaction.

The reactivity of metals is judged by the series known as reactivity series. Elements lying above in the series are more reactive than the elements lying below in the series.

As copper lies below hydrogen in the series, it cannot displace hydrogen when reacting with dilute HCl.

$Cu+HCl\rightarrow CuCl_2+H_2$ cannot take place as copper is less reactive than hydrogen.

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