3.15 Consider the corrosion of elemental iron in anaerobic waters (Fe° oxidized to Fe2+). with the reduction of protons (H*) to form hydrogen gas(H,): Fe + 2H* = Fe²+ + H2(g) (a) From thermodynamic considerations, calculate the equilibrium constant K at 25°C. (b) For T = 25°C, pH = 10, and [Fe"] = 10¬³ M, at what partial pressure of H, does this reaçtion become unfavorable?

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3.15 (a) and (b) please help!
### Corrosion of Elemental Iron in Anaerobic Waters

**Problem 3.15**

Consider the corrosion of elemental iron in anaerobic waters where iron (Fe⁰) is oxidized to Fe²⁺ with the reduction of protons (H⁺) to form hydrogen gas (H₂):

\[ \text{Fe}^0 + 2\text{H}^+ \rightarrow \text{Fe}^{2+} + \text{H}_2(g) \]

**Questions:**

(a) From thermodynamic considerations, calculate the equilibrium constant \( K \) at 25°C.

(b) For \( T = 25°C \), pH = 10, and \([\text{Fe}^{2+}] = 10^{-3} \, \text{M}\), at what partial pressure of \( \text{H}_2 \) does this reaction become unfavorable?
Transcribed Image Text:### Corrosion of Elemental Iron in Anaerobic Waters **Problem 3.15** Consider the corrosion of elemental iron in anaerobic waters where iron (Fe⁰) is oxidized to Fe²⁺ with the reduction of protons (H⁺) to form hydrogen gas (H₂): \[ \text{Fe}^0 + 2\text{H}^+ \rightarrow \text{Fe}^{2+} + \text{H}_2(g) \] **Questions:** (a) From thermodynamic considerations, calculate the equilibrium constant \( K \) at 25°C. (b) For \( T = 25°C \), pH = 10, and \([\text{Fe}^{2+}] = 10^{-3} \, \text{M}\), at what partial pressure of \( \text{H}_2 \) does this reaction become unfavorable?
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