Question

Out of Zn and Cu vessel, one will be more suitable to store 1M HCI?

Given, E^ΘZn²⁺/Zn = – 0.76 V

E^ΘCu²⁺/Cu = + 0.34 V

Answer 1

As we know that the metals having negative value of standard reduction potential (E^Θ) are highly reactive and displace hydrogen from acids. So, out of Zn and Cu vessel. Zn has negative value of E^Θ i.e, - 0.76 V, hence it displaces hydrogen from 1 M HCl and Cu has positive value of Ε^Θ i.e. +0.34V, hence it cannot displace hydrogen from 1 M HCI. Thus, it is concluded that Cu vessel will be more suitable to store 1 M HCI.