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Calculate cell potential of electrochemi...

Calculate cell potential of electrochemical cell made up of Cr and Na.
`E_(Cr^(+3)//Cr)^(@)=-0.74V,E_(Na^(+)//Na)^(@)=-2.71V`

A

3.45 V

B

`-1.97` V

C

`-3.45V`

D

1.97 V

Text Solution

Verified by Experts

The correct Answer is:
D
`E_(Cr^(+3)|Cr)^(@)=-0.74V,E_(Na^(+)|Na)^(@)=-2.71V`
`E_(cell)^(@)=E_("red (cathode)")^(@)-E_("red (anode)")^(@)`
=-0.74+2.71=1.97 V
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