Gcse chemistry question help

I’ve been given this chemistry question:
Nickel displaced copper in this reaction because it is more reactive than copper. Explain in terms of e- why this is the case.
I thought copper was more reactive? Also how would you explain the reactivity of them in terms of electrons?

Reply 1

charco

Study Forum Helper

Original post by Porkypig800

You can assess the reactivity as a reducing agent (releasing electrons) by the standard reduction potentials.

Cu²⁺(aq) + 2e <==> Cu(s) ................... Eº = +0.34V

Ni²⁺(aq) + 2e <==> Ni(s) .................... Eº = -0.23V

This means that nickel is a better reducing agent (loses electrons more easily)