Write balanced net ionic equation for the following reaction in acidic solution.
$H N O_{2} (a q) \to N O_{3}^{-} + N O (g)$

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Solution

Rule for balancing equation ion electron method :-
$1.$ Write down unbalanced equation.
$2.$ Assign oxidation number for all and separate into two half reaction
$[i -$ oxidation half reaction
$i i -$ reduction half reaction $]$
$3.$ Balanced all the elements except $O, H$
$4.$ Balance oxygen atom with $H_{2} O$
$5.$ Balance hydrogen atoms with $H^{+}$
$6.$ Balance charge on both sides and multiply with equivalent number to cancel out electrons on each side.
$7.$ Simplify and verify the reaction
$3 {H N O}_{2} ⇌ {N O}_{3}^{-} + 2 N O + H^{+} + H_{2} O$

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