In the balanced chemical equation for the reaction of with : What is the stoichiometric coefficient — Redox Reactions and Volumetric Analysis Chemistry Question

💡 Solution & Explanation

The n-factor of $As_2S_3$ is 28 (As oxidizes from +3 to +5: $2 \times 2 = 4$; S oxidizes from -2 to +6: $8 \times 3 = 24$; total $4+24=28$). The n-factor of $HNO_3$ is 3 (N reduces from +5 to +2). Cross-multiplying the n-factors gives the ratio $3 As_2S_3 : 28 HNO_3$.