In the first cell, the metal silver (Ag) is plated and in the second cell, the metal nickel (Ni) is plated.
Electrodes may be defined as electrical conductors operated to construct connections with a nonmetallic part of a circuit. An electrode is referred to as an anode or a cathode depending on the direction of the flow of electrons.
In the first cell,
[tex]Ag^+ + e^-[/tex] → Ag [tex]E^0[/tex] = 0.80V.
[tex]Al^3^+ + 3e^-[/tex] → Al [tex]E^0[/tex] = -1.66V.
In the second cell,
[tex]Zn^2^+ + 2e^-[/tex] → Zn [tex]E^0[/tex] = -0.76V.
[tex]Ni^2^+ + 2e^-[/tex] → Ni [tex]E^0[/tex] = -0.25V.
Since the cells are connected in series:
[tex]E_t_o_t_a_l[/tex] > 0.
∴The total potential, [tex]E^0_t_o_t_a_l[/tex] = [tex]E^0 _c_e_l_l1- E^0 _c_e_l_l2[/tex]
= (0.80 + 1.66 ) V - (0.25 +0.76 ) V
= 2.97 V
Therefore, it is well described above.
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