Question

reduction potential of Cu is 0.34V. predict whether it will liberate H2 gas or not on reacting with H2SO4 solution..Justify

Answer 1

In Question, Reduction potential is going from Copper (+2) to 0 .

But, In Question, Reaction is just opposite to that.
Reduction Potential :
Cu(2+) + 2e-------> Cu

E(reaction) = 0.34. (given)

But according to reaction which happens with sulphuric acid it is this -->

It is Cu ----->Cu(2+) +2e-
E = -0.34 V.



Here, EMF is negative, So Hydrogen gas will not be released.