Redox Flashcards
1
Q
What is e.m.f?
A
The standard electrode potential of a half cell connected to a SHE under standard conditions.
2
Q
What is the least powerful oxidising agent?
A
Li+
3
Q
What is the most powerful reducing agent?
A
Li+
4
Q
Define the standard potential electrode
A
The e.m.f of a cell containing a half-cell connected to a standard hydrogen electrode, measured under standard conditions of 298K, 100kPa and concentrations of 1moldm-3.
5
Q
Describe advantages of using hydrogen fuel cells rather than burning hydrogen directly.
A
- Quieter
- More efficient
- No nitrogen oxides formed
6
Q
Why is ethanol and hydrogen good for fuel cells compared to fossil fuels?
A
Ethanol comes from biomass.
Hydrogen is obtained by the electrolysis of water using a non-fossil source of energy.
There are renewable sources.
