Consider an electrochemical cell based on the reaction:
2H+ (aq) + Sn (s) → Sn2+ (aq) + H2 (g)
Which of the following actions would not change the measured cell potential?
lowering the pH in the cathode compartment
addition of more tin metal to the anode compartment
increasing the tin (II) ion concentration in the anode compartment
increasing the pressure of hydrogen gas in the cathode compartment
Any of the above will change the measured cell potential.