Consider an electrochemical cell with the following cell reaction where all reactants and products are at standard-state conditions.
Cu2+ (aq) + H2(g) ® Cu(s) + 2H+(aq)
Predict the effect on the emf of this cell of adding NaOH solution to the hydrogen half-cell until the pH equals 7.0.
The emf will increase.
The emf will decrease.
No change in the emf will be observed.