Question

What would happen when a small quantity of $H_2{O}_2$ is added to a solution of $FeS{O}_4$ ?

• A. $H_2$ is evolved.
• B. An electron is added to $F{e}^{2+}$
• C. An electron is lost by $F{e}^{2+}$
• D. None of the above

Answer 1

The correct option is C An electron is lost by $F{e}^{2+}$

$H_2{O}_2\to H_{2}O+\left[O\right]$

$2\stackrel{+2}{Fe}S{O}_4+H_{2}S{O}_4+\left[O\right]\to \stackrel{+3}{F{e}_2}(S{O}_4{)}_3+H_{2}O$
Here, one electron is lost by $F{e}^{2+}$ and it converts into $F{e}^{3+}.$