A standard electrochemical is constructed based on the redox equation and has a potential of 1.25 volts.
5 Fe(s) + 2 MnO4– + 16 H+ → 5 Fe2+ + 2 Mn2+ + 8 H2O
Described below are changes that are made to this standard cell. Circle one answer only as to whether the changes will result in higher, lower, or no change to the cell potential compared to the standard cell.
a) [MnO4–] is doubled: higher lower no change
b) [Mn2+] is doubled: higher lower no change
c) The pH is changed to 7.5: higher lower no change
d) The amount of Fe is doubled: higher lower no change
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