How many moles of are required to oxidize of to in acidic medium (expressed as a fraction , find )? — Mole Concept and Some Basic Concepts of Chemistry Chemistry Question

💡 Solution & Explanation

$Cr_2O_7^{2-} + 14H^+ + 6e^- \rightarrow 2Cr^{3+} + 7H_2O$ ($n=6$). <br>$Sn^{2+} \rightarrow Sn^{4+} + 2e^-$ ($n=2$). <br>Using Law of Equivalents: $\text{Eq. } K_2Cr_2O_7 = \text{Eq. } Sn^{2+}$. <br>$\text{moles } \times 6 = 1 \times 2 \Rightarrow \text{moles} = 2/6 = 1/3$. <br>The value of $x$ is 3.