trode (1, 2). By driving the electrode to more negative potentials (e.g by conne
ID: 474480 • Letter: T
Question
trode (1, 2). By driving the electrode to more negative potentials (e.g by connecting a battery or power supply to the cell with its negative side attached to the working elec- trode) the energy of the electrons is raised They can reach a level high enough to transfer into vacant electronic states on species in the electrolyte. In that case, a flow of electrons from electrode to solution (a reduction current) occurs (Figure 1.1.2a). Similarly, the en ergy of the electrons can be lowered by imposing a more positive potential, and at some point electrons on solutes in the electrolyte will find a more favorable energy on the elec- trode and will transfer there. Their flow, from solution to electrode, is an oxidation cur- rent (Figure 1.1.2b). The critical potentials at which these processes occur are related to the standard potentials, E0, for the specific chemical substances in the system.Explanation / Answer
Answer:
The elecrons tranfered to the vacant electron state and those are reduced. This potential is called the Standard potential E0.
Here applying the external soure (battery), Hence it is not the spontaneous reaction.
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