Which of the following have the same -factor? — Redox Reactions and Volumetric Analysis Chemistry Question

💡 Solution & Explanation

**(A)** $KMnO_4$ ($Mn^{+7} \rightarrow Mn^{+2}$), $n=5$. <br>**(B)** $K_2Cr_2O_7$ ($2Cr^{+6} \rightarrow 2Cr^{+3}$), $n=6$. <br>**(C)** $Fe_2(C_2O_4)_3$: $Fe$ is already +3. Only $3$ oxalates oxidize ($3 \times 2 e^-$), $n=6$. <br>**(D)** $FeC_2O_4$: $Fe^{2+} \rightarrow Fe^{3+}$ ($1$) and $C_2O_4^{2-} \rightarrow 2CO_2$ ($2$). Total $n=3$. <br>Both B and C have $n=6$. [2]