Consider a standard voltaic cell based on the reaction:
2 H+ (aq) + Sn (s) → Sn2+ (aq) + H2 (g)
Which of the following actions would change the emf of the cell?
a) Increasing the pH at the cathode
b) Lowering the pH at the cathode
c) Increasing [Sn2+] at the anode
d) Increasing the hydrogen gas pressure at the cathode
e) All of the above changes will alter the cell potential
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