Question

Electrode potential data are given below.
$F{e}^{3+}(aq)+e^{-}\to F{e}^{2+}(aq);E^o=+0.77$
$A{l}^{3+}(aq)+3e^{-}\to Al(s);E^o=-1.66V$
$B{r}_2(aq)+2e^{-}\to 2B{r}^{-}(aq);E^o=+1.08V$
Based on the data given above, reducing power of $F{e}^{2+},Al$ and $B{r}^{-}$ will increase in the order

• A. $B{r}^{-}<F{e}^{2+}<Al$
• B. $F{e}^{2+}<Al<B{r}^{-}$
• C. $Al<B{r}^{-}<F{e}^{2+}$
• D. $Al<F{e}^{2+}<B{r}^{-}$

Answer 1

Answer: (A)

The lowest the standard reduction potential, the highest is the reducing power.