Chapter 8 - Redox Potential Flashcards
1
Q
Oxidation
A
When a species loses electrons
For ex: O2 + 4H + 4e- -> H2O
2
Q
Reduction
A
When a species gains electrons
For ex: Fe2+ -> Fe3+ + e-
3
Q
Corrosion of water supply pipes
A
Clog pipes, increase consumers intake of metals (like iron), and costs billions of dollars annually. The corrosion occurs because of redox reactions
4
Q
Standard Reduction Potential
A
The more positive E, the greater the tendency for the species to be reduced. Half cell reactions are reversible.
5
Q
Nernst equation logK =
A
logK -> log(1/reactants)
6
Q
How do we measure redox potential?
A
Portable meters, colorimeters
6
Q
Eh decreases with….?
A
Decreasing dissolved O2 concentration
6
Q
What kind of relationship is there between Eh and pH?
A
Inverse relationship
