Identify the reaction intermediate of following reaction. (i)$2 \mathrm{SO}_{2(\mathrm{~g})}+2…
Identify the reaction intermediate of following reaction.
(i)$2 \mathrm{SO}_{2(\mathrm{~g})}+2 \mathrm{NO}_{2(\mathrm{~g})} \rightarrow 2 \mathrm{SO}_{3(\mathrm{~g})}+2 \mathrm{NO}$
(ii)$\frac{2 \mathrm{NO}_{(\mathrm{g})}+\mathrm{O}_{2(\mathrm{~g})} \rightarrow 2 \mathrm{NO}_{2(\mathrm{~g})}}{2 \mathrm{SO}_{2(\mathrm{~g})}+\mathrm{O}_{2(\mathrm{~g})} \rightarrow 2 \mathrm{SO}_{3(\mathrm{~g})}}$
$\mathrm{NO}_{2(\mathrm{~g})}$
$\mathrm{NO}_{(\mathrm{g})}$
$\mathrm{SO}_{2(\mathrm{~g})}$
$\mathrm{O}_{2(\mathrm{~g})}$
Solution
Given
Step I: \(2 \mathrm{SO}_2(g)+2 \mathrm{NO}_2(g) \rightarrow 2 \mathrm{SO}_3(g)+\circ \mathrm{NO}(g)\)
Step II: \(2 \mathrm{NO}(\mathrm{g})+\mathrm{O}_2(\mathrm{g}) \rightarrow 2 \mathrm{NO}_2(\mathrm{g})\)
An intermediate formed in the reaction is not a part of overall reaction.
Net reaction: \(2 \mathrm{SO}_2(g)+\mathrm{O}_2(g) \rightarrow 2 \mathrm{SO}_3(g)\)
As, \(\mathrm{NO}(\mathrm{g})\) formed in first elementary step is neither a reactant nor product in the net reaction. It is formed in one elementary step and consumed in the next step. Thus NO, \(=(\mathrm{g})\) act as an intermediate.