Chemistry - Redox Reactions Question with Solution | TestHub

A mixture of FeO and ${\mathrm{Fe}}_2{\mathrm{O}}_3$ is completely reacted with 100 mL of 0.25 M acidified ${\mathrm{KMnO}}_4$ solution. The resultant solution was then treated with Zn dust which converted ${\mathrm{Fe}}^{3+}$ of the solution to ${\mathrm{Fe}}^{2+}$. The ${\mathrm{Fe}}^{2+}$ required 1000 mL of 0.1 $\mathrm{M}{\mathrm{K}}_2{\mathrm{Cr}}_2{\mathrm{O}}_7$ solution. Find out the percentage by weight of ${\mathrm{Fe}}_2{\mathrm{O}}_3$ in the mixture (Atomic weight of $Fe=56$ )