For the given cell Fe2+(aq) + Ag+(aq) Fe3+(aq) + Ag(s) The standard cell potential of the above reaction is Given: Ag+ + e– Ag E = x V Fe2+ + 2e– Fe E = y V Fe3+ + 3e– Fe E = z V (A) x + y – z (B) x +

Question

For the given cell Fe2+(aq) + Ag+(aq) Fe3+(aq) + Ag(s) The standard cell potential of the above reaction is Given: Ag+ + e– Ag E = x V Fe2+ + 2e– Fe E = y V Fe3+ + 3e– Fe E = z V

(A) x + y – z
(B) x + 2y
(C) y – 2x
(D) x + 2y –3z

Prashant Kotian · Accepted Answer

Correct answer: D. Fe3+ + e– Fe2+ (iv) = (iii) – (ii) 2 3 4 G G G      2 3 4 E . F . E . F . E . F .     2 3 4 E E E   = 3z – 2y E0 = Fe Fe Ag Ag 3 E E    = y – Fe Fe 3 E   = x + 2y – 3z

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