Question

Complete the given reactions.

(1) $2MnO_{4}^{-} + H_{2}O + I^{-}\overset{\quad\quad}{\rightarrow}2\underline{(i)} + 2OH^{-} + IO_{3}^{-}$

(2) $MnO_{4}^{-} + 5Fe^{2 +} + 8H^{+}\overset{\quad\quad}{\rightarrow}\underline{(ii)} + 5\underline{(iii)} + 4H_{2}O$

(i) (ii) (iii)

• A. $MnO_{2}$ $Mn^{2 +}$ $Fe^{3 +}$
• B. $Mn^{2 +}$ $MnO_{2}$ $Fe^{3 +}$
• C. $MnO_{2}$ $MnO_{4}^{2 -}$ $Fe(OH)_{3}$
• D. $MnO_{4}^{2 -}$ $Mn^{2 +}$ $Fe_{2}O_{3}$

Answer 1

Answer: (A)

$MnO_{2}$ $Mn^{2 +}$ $Fe^{3 +}$

Answer 2

$2MnO_{4}^{-} + H_{2}O + I^{-} \rightarrow 2MnO_{2} + 2OH^{-} + IO_{3}^{-}$

$MnO_{4}^{-} + 5Fe^{2 +} + 8H^{+} \rightarrow Mn^{2 +} + 5Fe^{3 +} + 4H_{2}O$