Question

Calculate the standard cell potential of galvanic cell in which the following reaction takes place
`2Cr_(s)+3Cd_(aq)^(+2)rarr2cr_(aq)^(+3)+3Cd_(s)`
Given `E_(Cr^(+3)//Cr)=-0.74(V)E^(@)_(Cd^(+2)//Cd)=-0.04(V)`
A. 0.74 V
B. 1.14 V
C. 0.34 V
D. `-0.34 V`

Answer 1

Correct Answer - C
`E_"cell"^@=E_"cathode"^@-E_"anode"^@`
`E_"cell"^@=E_(Cd^(2+)//Cd)^@-E_(Cr^(3+)//Cr)^@`
=-0.40-(-0.74)=+0.34 V