Chemistry - Redox Reactions Question with Solution | TestHub

${\mathrm{Na}}_2\stackrel{(+2)}{{\mathrm{S}}_2}{\mathrm{O}}_3\to {\mathrm{Na}}_2\stackrel{(+2.5)}{{\mathrm{S}}_4}{\mathrm{O}}_6$

n-factor (e- transfer per mole) $=(+2$ to +2.5$)\times 2$ "S atom $=1$

${\mathrm{E}}_{{\mathrm{Na}}_2{\mathrm{S}}_2{\mathrm{O}}_3}=\frac{\text{ Molar mass }}{\mathrm{n}-\text{ factor }}=\frac{158}{1}$

${\mathrm{KMnO}}_4\underset{\text{ medium }}{\overset{\text{ basic }}{\to }}{\mathrm{K}}_2{\stackrel{+}{\mathrm{MnO}}}_4$

n -factor to (+7 to +6) for 1 Mn atom

${\mathrm{E}}_{{\mathrm{KMnO}}_4}=\frac{\text{ Molar mass }}{1}=\frac{158}{1}$