Question

Which of the following statements is correct for the given reaction?
$H_2{O}_2+KMn{O}_4+H_{2}S{O}_4\to MnS{O}_4+H_{2}O+O_2+K_{2}S{O}_4$

• A. Number of gram equivalents of $H_2{O}_2$ and $KMn{O}_4$ react in the ratio 5 : 2
• B. Number of moles of $MnS{O}_4$ and $O_2$ produced are in the ratio of 5 : 2
• C. Stoichiometric coefficient of $H_2{O}_2$ in the balanced reaction is 2
• D. Stoichiometric coefficient of $KMn{O}_4$ in the balanced reaction is 2

Answer 1

The correct option is D Stoichiometric coefficient of $KMn{O}_4$ in the balanced reaction is 2

$5\times (H_2{O}_2\to 2H^{+}+O_2+2e^{-})$

$2\times (Mn{O}_4^{-}+8H^{+}+5e^{-}\to M{n}^{2+}+4H_{2}O)$

$5H_2{O}_2+2KMn{O}_4+3H_{2}S{O}_4\to 5O_2+2MnS{O}_4+8H_{2}O+K_{2}S{O}_4$

Number of gm equivalents of $H_2{O}_2$ = Number of gm equivalents of $KMn{O}_4$

$\frac{MolesofMnS{O}_4}{Molesof{O}_2}=\frac{2}{5}$