Question

What statement is NOT true about standard electrode potentials?

A. E°cell is the difference in voltage between the anode and the cathode.
B. The electrode potential of the standard hydrogen electrode is exactly zero.
C. E°cell is positive for spontaneous reactions.
D. Electrons will flow from more negative electrode to more positive electrode.

Answer 1

(a)
`E^(\circ)_(cell)` is the difference in voltage between the anode and the cathode .

Step-by-step explanation:

If
`E^(\circ)_(cell)` will be the difference anode and the cathode means
`E^(\circ)_(cell)=E^(\circ)_(anode)-E^(\circ)_(cathode)`n as we know that cathode potential is greater than the anode potential so
`E^(\circ)_(cell)` will become negative and if
`E^(\circ)_(cell)` is negative then reaction will not be spontaneous so the correct relation of
`E^(\circ)_(cell)` is
`E^(\circ)_(cell)=E^(\circ)_(cathode)-E^(\circ)_(anode)`