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If the half cell reactions are given as ...

If the half cell reactions are given as
(i) `Fe^(2+)(Aq)+2e^(-)rarr Fe(s),E^(@)=-0.44 V`
(ii) `2H^(+)(sq)+1/2 O_(2)(g)+2e^(-)rarrH_(2)O(l) E^(@)=+1.23 V`
The `E^(@)` for the reaction
`Fe(s)+2H^(+)+1/2O_(2)(g)rarrFe^(2+)(aq)+H_(2)O(l)` will be

A

`-0.79`

B

`-1.67 V`

C

`1.67 V`

D

`0.79 V`

Text Solution

Verified by Experts

The correct Answer is:
C
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If the half cel reactions are given as (i) Fe^(2+)(Aq)+2e^(-)rarr Fe(s),E^(@)=-0.44 V (ii) 2H^(+)(sq)+1/2 O_(2)(g)+2e^(-)rarrH_(2)O(l) E^(@)=+1.23 V The E^(@) for the reaction Fe(s)+2H^(+)+1/2O_(2)(g)rarrFe^(2+)(g)rarr Fe^(2+)(aq)H_(2)O(l) will be

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