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Oxidising Reagent and Reducing Reagent

What volume o...

Question

What volume of $3$ M $H N O_{3}$ is needed to oxidize $8$ g of $F e^{2 +}$ to $F e^{3 +}$ ? $H N O_{3}$ gets converted to $N O$ .

8 m L

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16 m L

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32 m L

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64 m L

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Solution

The correct option is C $16 m L$
Reactions:
$H N O_{3} \to N O$
+5 +2
$F e^{+ 2} \to F e^{+ 3}$
+2 +3
At equivalent point,
$N_{1} V_{1} = N_{2} V_{2}$
$3 * 3 * V = 8 * 1000 / 56; V = 16 m l$

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