consider the standard reduction potentials (in volts) as shown in figure Find `E^(@)`

Options

A. `-0.326 V`
B. `-0.425 V`
C. `-0.756 V`
D. `-0.512`

Answer

C

Explanation

`{:(SO_(4)^(2-)+2erarrSO_(3)^(2-)" "E^(@)=-0.936),(SO_(3)^(2-)+2e rarr(1)/(2)S_(2)O_(3)^(2-)" "E^(@)=-0.576),(---------------),(SO_(4)^(2-)+4e rarr(1)/(2)S_(2)O_(3)^(2-)):}`
`E^(@)=(-2xx0.936-2xx0.576)/(4)=-0.756 V`