SATHEE: Qualitative Analysis - Result Question 63

Qualitative Analysis - Result Question 63

####66. The acidic aqueous solution of ferrous ion forms a brown complex in the presence of $N O_{3}^{-}$ , by the following two steps :

$\begin{matrix} {[F e {(H_{2} O)}_{6}]}^{2 +} + N O_{3}^{-} + H^{+} ⟶ \dots + {[F e {(H_{2} O)}_{6}]}^{3 +} \\ {[F e {(H_{2} O)}_{6}]}^{2 +} + \dots ⟶ \dots \dots + H_{2} O \end{matrix}$

Complete and balance the equation.

(1993, 2M)

Show Answer

Solution:

$3 {[F e {(H_{2} O)}_{6}]}^{2 +} + N O_{3}^{-} + 4 H^{+} ⟶ N O + 3 {[F e {(H_{2} O)}_{6}]}^{3 +}$

${[F e {(H_{2} O)}_{6}]}^{2 +} + N O ⟶ {[F e {(H_{2} O)}_{5} N O]}^{2 +} + H_{2} O$

$+ 2 H_{2} O$

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Qualitative Analysis - Result Question 63

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