Qualitative Analysis - Result Question 63
66. The acidic aqueous solution of ferrous ion forms a brown complex in the presence of $NO _3^{-}$, by the following two steps :
$\begin{gathered} {\left[Fe\left(H _2 O\right) _6\right]^{2+}+NO _3^{-}+H^{+} \longrightarrow \ldots+\left[Fe\left(H _2 O\right) _6\right]^{3+}} \\ {\left[Fe\left(H _2 O\right) _6\right]^{2+}+\ldots \longrightarrow \ldots \ldots+H _2 O} \end{gathered}$
Complete and balance the equation.
(1993, 2M)
Show Answer
Solution:
$\begin{array}{r} 3\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}+\mathrm{NO}_3^{-}+4 \mathrm{H}^{+} \longrightarrow \mathrm{NO}+3\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+} +2 \mathrm{H}_2 \mathrm{O} \end{array}$
$\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}+\mathrm{NO} \longrightarrow\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_5 \mathrm{NO}\right]^{2+}+\mathrm{H}_2 \mathrm{O}$
BETA
