Chemistry - Redox Reactions Question with Solution | TestHub

${\mathrm{P}}_4{\mathrm{S}}_3+\mathrm{N}{\mathrm{O}}_3^{-}\mathrm{ }\to {\mathrm{H}}_3\mathrm{P}{\mathrm{O}}_4+\mathrm{S}{{\mathrm{O}}_4}^{2-}+\mathrm{N}\mathrm{O}$
$({\text{P}}_{\text{4}}{\text{S}}_{\text{3}}\text{+}\text{28}{\text{H}}_{\text{2}}\text{O}\to \text{4}{\text{H}}_{\text{3}}{\text{PO}}_{\text{4}}\text{+}\text{3}{\text{SO}}_4^{2-}\text{+}\text{44}{\text{H}}^{\text{+}}\text{+38}{\text{e}}^{-})\text{×}\text{3}$
$({\text{NO}}_3^{-}\text{+}\text{4}{\text{H}}^{\text{+}}\text{+}\text{3}{\text{e}}^{-}\to \text{NO}\text{+}\text{2}{\text{H}}_{\text{2}}\text{O})\text{×}\text{38}$
$\therefore \text{ 3}{\text{P}}_{\text{4}}{\text{S}}_{\text{3}}\text{+}\text{38}{\text{NO}}_3^{-}\text{+}\text{8}{\text{H}}_{\text{2}}\text{O}\text{+}\text{20}{\text{H}}^{\text{+}}\to \text{12}{\text{H}}_{\text{3}}{\text{PO}}_{\text{4}}\text{+}\text{9}{\text{SO}}_4^{2-}\text{+}\text{38}\text{NO}$