Mohr's salt is estimated by titrating against $\mathrm{KMnO}_{4}$ solution in acid medium. The numbe

Question

Mohr's salt is estimated by titrating against $\mathrm{KMnO}_{4}$ solution in acid medium. The number of moles of Mohr's salt oxidized by one mole of $\mathrm{KMnO}_{4}$ is\

Professor PC Thomas Classes · Answer

Mohr's salt is\ $\mathrm{FeSO}_{4} \cdot\left(\mathrm{NH}_{4}ight)_{2} \mathrm{SO}_{4} \cdot 6 \mathrm{H}_{2} \mathrm{O}$\ During oxidation\ $\mathrm{Fe}^{2+}$ changes $\mathrm{Fe}^{3+}$. While $\mathrm{MnO}_{4}^{-}$reduces to $\mathrm{Mn}^{2+}$\  Cross multiply $$ 5 \mathrm{Fe}^{2+}+1 \mathrm{MnO}_{4}^{-} ightarrow 5 \mathrm{Fe}^{3+}+1 \mathrm{Mn}^{2+} $$