ELECTRO CHEMISTRY l ELECTRO CHEMICAL CELLS l CHEMISTRY OF CELLS

1. Electrochemistry
( Electrolytic cell )
Std 12 sci ( E )
Chapter-3 – Electrochemistry
Lecture – 1
By :- Ms. MAYRI R SOMPURA
HJD INSTITUTE KERA-KUTCH

2. Electrochemistry
CATHODE – WHERE REDUCTION OCCURS
ANODE – WHERE OXIDATION OCCURS

3. Electro - chemistry
ELECTRICAL ENERGY CHEMICAL ENERGY
ELECTRICAL ENERGY CHEMICAL ENERGY ELECTROLYTIC CELL
ELECTRICAL ENERGY CHEMICAL ENERGY GALVANIC CELL
ELECTROCHEMISTRY
ELECTROLYTIC
CELL
GALVANIC CELL
CONDUCTION OF
SOLUTION

4. ELECTROLYTIC CELL
ELECTRICAL ENERGY CHEMICAL ENERGY ELECTROLYTIC CELL
INPUT OUTPUT
• NON SPONTANEOUS Redox reaction occurs.
• Change in ΔG = - ve
• ΔG = ΔH - TΔS
Non spontaneous
rxn = ΔG = +ve
Spontaneous = ΔG
= - ve
NOTE

5. ELECTROLYTIC CELL
 Electrolytic solution :- It is a solution where molecules are
bound by an electrovalent bond.
 Electrovalent bond :- It is also known as IONIC BOND,
i.e. a complete transfer of electrons.
 Eg, NaCl
 At anode :- ( +ve terminal )
 A- → 1e- + A ( Half oxidation )
 At cathode :- ( -ve terminal )
 C+ + 1e- → C ( half reduction )
Overall reaction :-
A- → 1e- + A
C+ + 1e- → C
A- + C+ → C + A

6. ELECTROLYTIC CELL
CATION CATHODE REDUCTION
ANION ANODE OXIDATION
ELECTRON
GAIN
ELECTRON
LOSS