5.6 - Redox reactions and electrode potentials Flashcards
1
Q
What is an oxidising agent?
A
- take electrons from species being oxidised
- contains reduced species
2
Q
What is a reducing agent?
A
- adds electrons to species being reduced
- contains oxidised species
3
Q
Define standard electrode (redox) potential (E)
A
tendency to be reduced and gain electrons
4
Q
Describe how to interpret E values
A
more + = greater tendency to gain electrons and undergo reduction
more - = greater tendency to lose electrons and undergo oxidation
5
Q
Describe how to calculate E of a cell
A
(E at + electrode) - (E at - electrode)
6
Q
What does a fuel cell do?
A
uses energy from reaction of a fuel with O2 to create a voltage
