Table of Contents
Chapter 4: Environmental Oxidation/Reduction & Electrochemistry in Water
Why is this so important environmentally?
What is Redox? It can be expressed as an electron transfer.
Redox Reactions
Half Reactions add to make complete reactions
Oxidation is important in water treatment (ammonium ion to nitrate)
The solubilizing of iron in ìreducing conditionsî
In the Biosphere
Gibbs Free Energy describes where a reaction requires energy to proceed or is spontaneous with its own energy
Rules for determining oxidation numbers
Examples (algebraically)
Alternative rules for oxidation number ID
Example of env. importance
Ex. Redox solubility of Pb in homes
PPT Slide
Env. Standard Metal Concentrations
Corrosion
Corrosion
Fe Corrosion (cont.)
Fe Corrosion (cont.)
Corrosion of Iron in Contact with Water
Corrosion of Iron
PPT Slide
Mechanism of Iron Corrosion
Mechanism of Iron Corrosion
PPT Slide
Corrosion of Iron Prevented by Metal
Galvanization
PPT Slide
PPT Slide
Electrical Potential in a natural water body
PPT Slide
We must understand the process
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Author: Duquesne University
Email: kingston@duq.edu
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