E l e c t r o d e   p o t e n t i a l   f o r   t h e   f o l l o w i n g   h a l f - c e l l   r e a c t i o n s   a r e Z n Z n 2 + + 2 e - , E o = + 0 . 76 V F e F e 2 + + 2 e - , E o = + 0 . 44 V T h e   E M F   f o r   t h e   c e l l   r e a c t i o n   F e 2 + + Z n 2 + + F e   w i l l   b e ( 1 ) - 0 . 32   V ( 2 ) + 1 . 20   V ( 3 ) - 1 . 20   V ( 4 ) + 0 . 32   V

The reaction is:

    Fe2+ + Zn  Fe + Zn​2+

E0cell  = Ecathode - Eanode
           = (-0.44) - (-0.76) 
           = -0.44+0.76 = 0.32 V

Correct option is (d).

  • 1
What are you looking for?