Question

When $H_2{O}_2$ is added to acidified ferrous sulphate solution:

• A. electrons are gained by $F{e}^{2+}$
• B. electrons are lost by $F{e}^{2+}$
• C. no loss or gain of electrons
• D. iron hydroxide precipitated

Answer 1

The correct option is B electrons are lost by $F{e}^{2+}$

$F{e}^{2+}$ turns into $F{e}^{3+}$ by losing one electron.
$2F{e}^{2+}+2H^{+}+H_2{O}_2\stackrel{\text{acidic}}{⟶}2F{e}^{3+}+2H_{2}O$.