The standard reduction potential for Mg2-Mg is -2-37V and for Cu2-Cu is 0-337- The Eocell for the following reaction is Mg-Cu2- Mg2-Cu

The correct option is D +2.7V E^o_cell=E^o_cathode E^o_anode =E^o_(Cu^2+/Cu) E^o_(Mg^2+/Mg)=0.337 ( 2.37)V =2.7V ...

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Standard XII

Chemistry

Electrolytic Cell

The standard ...

Question

The standard reduction potential for $M g^{2 +} / M g$ is $- 2.37 V$ and for $C u^{2 +} / C u$ is $0.337$ . The $E_{c e l l}^{o}$ for the following reaction is $M g + C u^{2 +} \to M g^{2 +} + C u$

+ 2.03 V

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- 2.03 V

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- 2.7 V

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+ 2.7 V

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Solution

The correct option is D $+ 2.7 V$
$E_{c e l l}^{o} = E_{c a t h o d e}^{o} - E_{a n o d e}^{o}$
$= E_{(C u^{2 +} / C u)}^{o} - E_{(M g^{2 +} / M g)}^{o} = 0.337 - (- 2.37) V$
$= 2.7 V$

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Similar questions

Q. Refer to the following experimental data.

Half Reaction	Eo
I. $M g \to {M g}^{2 +} + 2 e^{-}$	2.37V
II. $M n \to {M n}^{2 +} + 2 e^{-}$	1.03V
III. $H_{2} \to 2 H^{+} + 2 e^{-}$	0.00V
IV. $C u \to {C u}^{2 +} + 2 e^{-}$	-0.16V

What will be the standard reduction potential for the reaction:

M g + M n^{2 +} \to M g^{2 +} + M n

For a cell, the cell reaction is $M g (s) + C u^{2 +} (a q) \to M g^{2 +} (a q) + C u (s)$ . If the S.R.P. values of $M g$ and $C u$ are $- 2.37 V$ and $+ 0.34 V$ respectively, the EMF of the cell is: