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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")^@`
` =0.3 - (- 2.3 7) = +2. 71 V`.
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