electrode potentials - physical Flashcards
(10 cards)
1
Q
what are the standard conditions for a cell
A
100 KPa
293 k
1 moldm-3
2
Q
what are electrode potentials measured relative to ?
A
standard hydrogen electrode
3
Q
describe the standard hydrogen elctrode half cell
A
- inert platinum electrode
- h2 gas pumped in via a glass bell
- h+ ions in solution
- 2H+ + 2e- -> H2
4
Q
describe a metal/metal ion half cell
A
- metal electrode (e.g Ag)
- metal ions in solution
5
Q
describe a non-metal/non-metal half cell
A
- platinum electrode
- non-metal ions in solution
6
Q
describe an ion/ion half cell
A
- platinum electrode
- ions in solution
7
Q
what happens to the more positive electrode potential?
A
it is reduced (shift to right)
8
Q
what happens to the more negative electrode potential?
A
it is oxidised (shift to left)
9
Q
what is the equation to calculate E֯
A
E֯ red - E֯ oxi
10
Q
on what side of a cell diagram does oxidation typically occur?
A
left
