Class 12 Chemistry Notes
Electrochemistry + Thermodynamics
✔ Quick Revision
✔ Important Formulas
✔ Board Exam Focus
Score Better in Exams ■
Based on Board Exam Pattern
, u
FORMULAS- ELECTROCHEMISTY
Important Terms, Definitions & Formulae
XII Chemistry
CHAPTER - 5 ELECTROCHEMISTRY
1. Eө cell = Eө cathode – Eө anode
0.059 1
2. E = Eө - log n+ (At 298 K)
n [M ]
2.303RT [Anode ion]
3. Ecell = Eөcell - log
nF [Cathode ion]
0.059
4. Eөcell = log K c (At 298 K)
n
5. ∆Gө = -nFEөcell
l 1 l
6. R=ρ =
A κ A
1
7. Conductance:G =
R
8. Conductivity = Conductance × Cell constant
1 1 l l
9. κ = = ( ) =G
ρ R A A
*
10. Cell constant and is denoted by the symbol G
Specific conductance κ
11. Λm = =
Molarity C
κ x 1000
12. Λm =
C
Remember:
Unit of Λm in above formula is Scm2mol-1
∧c
13. α = m
0
∧m
c α2
14. K a =
1-α
Electrochemistry + Thermodynamics
✔ Quick Revision
✔ Important Formulas
✔ Board Exam Focus
Score Better in Exams ■
Based on Board Exam Pattern
, u
FORMULAS- ELECTROCHEMISTY
Important Terms, Definitions & Formulae
XII Chemistry
CHAPTER - 5 ELECTROCHEMISTRY
1. Eө cell = Eө cathode – Eө anode
0.059 1
2. E = Eө - log n+ (At 298 K)
n [M ]
2.303RT [Anode ion]
3. Ecell = Eөcell - log
nF [Cathode ion]
0.059
4. Eөcell = log K c (At 298 K)
n
5. ∆Gө = -nFEөcell
l 1 l
6. R=ρ =
A κ A
1
7. Conductance:G =
R
8. Conductivity = Conductance × Cell constant
1 1 l l
9. κ = = ( ) =G
ρ R A A
*
10. Cell constant and is denoted by the symbol G
Specific conductance κ
11. Λm = =
Molarity C
κ x 1000
12. Λm =
C
Remember:
Unit of Λm in above formula is Scm2mol-1
∧c
13. α = m
0
∧m
c α2
14. K a =
1-α
