Chemistry - Redox Reactions Question with Solution | TestHub

Meq. of${\mathrm{A}\mathrm{s}}_2{\mathrm{O}}_3$= Meq of${\text{KMnO}}_4\left({\text{As}}_2^{3+}\to 2{\text{As}}^{5+}+4{\text{e}}^{-}\right)$

$\frac{0.1156}{198/4}\times 1000=\text{ M}\times 5\times 27.08\left({\text{Mn}}^{7+}+5{\text{e}}^{-}\to {\text{Mn}}^{2+}\right)$

$\therefore$M = 0.0172

$\therefore$${\mathrm{M}}_{\mathrm{M}\mathrm{n}{\mathrm{O}}_4^{-}}\mathrm{ }\mathrm{ }=\mathrm{ }0.0172\mathrm{ }\mathrm{M}$