An ore of iron, Wustite, is analyzed and found to have the non-stoichiometric formula . The percenta — Redox Reactions and Volumetric Analysis Chemistry Question

💡 Solution & Explanation

Let the number of $Fe^{3+}$ ions be $y$. The number of $Fe^{2+}$ ions is $0.93 - y$. To balance the -2 charge of oxygen: $3y + 2(0.93 - y) = 2 \Rightarrow y + 1.86 = 2 \Rightarrow y = 0.14$. The fraction of $Fe^{3+}$ is $0.14 / 0.93 = 0.1505$. As a percentage, it is roughly $15\%$.