Chemistry - Mole Concept Question with Solution | TestHub

From the given balanced equation, it is clear that only two moles of NO₃⁻ undergo a change in oxidation state, while six moles remain in the same oxidation state.

$2HN{O}_3+6H^{+}+6e^{-}⟶2NO+4H_{2}O$

A total of 8 moles of HNO₃ exchange 6 moles of electrons. Therefore, 1 mole of HNO₃ exchanges $\frac{6}{8}$ or $\frac{3}{4}$ mole of electrons.

Thus, the n-factor of HNO₃ is $\frac{3}{4}$.

The equivalent weight of HNO₃ is $\frac{63}{3/4}$.