Question

Standard electrode potential for $S{n}^{4+}/Sn$ couple is +0.15 V and that for the $C{r}^{3+}/Cr$ couple is –0.74 V. These two couples in their standard state are connected to make a cell. The cell potential will be:

• A. +1.83 V
• B. +1.19 V
• C. +0.89 V
• D. +0.18 V

Answer 1

The correct option is C +0.89 V

$E_{cell}=E_{cathode}-E_{anode}=0.15-(-0.74)=+0.89V$