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Consider the reaction between dissolved Fe²* and elemental sulfur (S°) to form hematite (Fe2O3) and sulfide HS- Fe2+ + S° → Fe2O3 + HS- a) Identify the oxidant and reductant in this reaction, determine half-reactions, and balance the reaction. b) Is this reaction thermodynamically favorable? c) Would you expect HS to react readily with Fe2O3 (i.e. the reverse of the reaction)?

Consider the reaction between dissolved Fe²* and elemental sulfur (S°) to form hematite (Fe2O3) and sulfide HS- Fe2+ + S° → Fe2O3 + HS- a) Identify the oxidant and reductant in this reaction, determine half-reactions, and balance the reaction. b) Is this reaction thermodynamically favorable? c) Would you expect HS to react readily with Fe2O3 (i.e. the reverse of the reaction)?

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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Consider the reaction between dissolved Fe2+ and elemental sulfur (S0) to form hematite (Fe2O3) and sulfide 
a) Identify the oxidant and reductant in this reaction, determine half-reactions, and balance the
reaction.

b) Is this reaction thermodynamically favorable?

c) Would you expect HS- to react readily with Fe2O3 (i.e. the reverse of the reaction)?

**Consider the reaction between dissolved Fe²⁺ and elemental sulfur (S⁰) to form hematite (Fe₂O₃) and sulfide HS⁻** \[ \text{Fe}^{2+} + \text{S}^{0} \rightarrow \text{Fe}_2\text{O}_3 + \text{HS}^- \] **a) Identify the oxidant and reductant in this reaction, determine half-reactions, and balance the reaction.** **b) Is this reaction thermodynamically favorable?** **c) Would you expect HS⁻ to react readily with Fe₂O₃ (i.e. the reverse of the reaction)?** **Explanation:** This section presents a chemical reaction involving the oxidation and reduction of elements. You are asked to identify the oxidizing and reducing agents, and determine if the reaction is thermodynamically favorable. This will also require determining the half-reactions and balancing the entire reaction equation. Finally, consider if the reverse reaction, involving HS⁻ and Fe₂O₃, is likely.
Transcribed Image Text:**Consider the reaction between dissolved Fe²⁺ and elemental sulfur (S⁰) to form hematite (Fe₂O₃) and sulfide HS⁻** \[ \text{Fe}^{2+} + \text{S}^{0} \rightarrow \text{Fe}_2\text{O}_3 + \text{HS}^- \] **a) Identify the oxidant and reductant in this reaction, determine half-reactions, and balance the reaction.** **b) Is this reaction thermodynamically favorable?** **c) Would you expect HS⁻ to react readily with Fe₂O₃ (i.e. the reverse of the reaction)?** **Explanation:** This section presents a chemical reaction involving the oxidation and reduction of elements. You are asked to identify the oxidizing and reducing agents, and determine if the reaction is thermodynamically favorable. This will also require determining the half-reactions and balancing the entire reaction equation. Finally, consider if the reverse reaction, involving HS⁻ and Fe₂O₃, is likely.
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