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Consider the cell reaction : Mg(s)+Cu^...

Consider the cell reaction `:`
`Mg(s)+Cu^(2+)(aq) rarr Cu(s) +Mg^(2+)(aq)`
If `E^(c-)._(Mg^(2+)|Mg(s))` and `E^(c-)._(Cu^(2+)|Cu(s))` are `-2.37` and `0.34V`, respectively. `E^(c-)._(cell)` is

A

2.03 V

B

`-2.03 V`

C

`+ 2.71 V`

D

`-2.71 V`

Text Solution

Verified by Experts

The correct Answer is:
C
`E_(cell)^(@)=E_("Cathode")^(@)-E_("Anode")^(@)`
`=E_("Reduced species")^(@)-E_("Oxidised species")^(@)`
`=0.34-(-2.37)=+2.71 V`
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