Chapter 12: Electrochemistry Flashcards
1
Q
log 1
A
0
2
Q
log 10
A
1
3
Q
Ecell positive
A
Keq is positive
4
Q
Ecell negative
A
Keq is negative
5
Q
Moles of electrons transferred during reduction
A
M^n+ + n e- → M (s)
6
Q
Electrodeposition equation
A
mol M = I t / n F
I = current
t = time
n = number of electrons equivalents for a specific metal
7
Q
Standard change in free energy from standard emf
A
ΔG° = −nFE°
n = number of moles of electrons exchange
8
Q
ΔG in galvanic cells
A
Negative
9
Q
Nernst equation (full)
A
E = E° - R T / n F ln Q
10
Q
Nernst equation (simplified)
A
E = E° - (0.0592 /n) logQ at 298 K
11
Q
Standard change in free energy from equilibrium constant
A
ΔG° = -RTlnK
12
Q
Free energy change (nonstandard condition)
A
ΔG = ΔG° + RT ln Q
