What will be the electro motive force for following cell at 298 K Zn-s-Zn-2-0-2 M-Fe-3-0-001 M-Fe-s- if Image not present - -0-036 and Image not present - -0-76 V- -1- 0-763 V -2- 0-685 V -3- -0-685 V -4- -0-763 V

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Electromagnetic Induction

What will be ...

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What will be the electro motive force for following cell at 298 K Zn(s)\vert Zn+2(0.2 M)\vert\vert Fe+3(0.001 M)\vert Fe(s) if Image not present = –0.036 and Image not present = –0.76 V. (1) 0.763 V (2) 0.685 V (3) –0.685 V (4) –0.763 V

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The standard electrode potentials of Zn²⁺/Zn and Ag⁺/Ag are -0.763 V and +0.799 V respectively. The standard potential of the cell is

[KCET 1993]

E^{o}

M g^{2 +} / M g = - 2.37 V, Z n^{2 +} / Z n = - 0.76 V

F e^{2 +} / F e = - 0.44 V

E_{F e^{3 +} / F e^{2 +}}^{0} = - 0.36 V

E_{F e^{2 +} / F e}^{0} = - 0.439 V

E_{F e^{3 +} . F e^{2 +}}^{0}

E^{⊖} o f M g^{2 +} | M g, Z n^{2 +} | Z n,

F e^{2 +} | F e

- 2.37 V

- 0.76 V

0.44 V

{Z n}^{2 +} | Z n (- 0.76 V)

{F e}^{2 +} | F e (- 0.41 V)

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