After studying this Unit, you will be
·able to
describe an electrochemical cell
and differentiate between galvanic
and electrolytic cells;
·
apply 
Nernst 
equation 
for
calculating the emf of galvanic cell
and define standard potential of
the cell;
·
derive relation between standard
potential of the cell, Gibbs energy
of cell reaction and its equilibrium
constant;
·
define resistivity (r), conductivity
(k) and molar conductivity (✆m) of
ionic solutions;
·
differentiate 
between 
ionic
(electrolytic) 
and 
electronic
conductivity;
·
describe 
the 
method 
for
measurement of conductivity of
electrolytic 
solutions 
and
calculation 
of 
their 
molar
conductivity;
·
justify 
the 
variation 
of
conductivity 
and 
molar
conductivity of solutions with
change in their concentration and
define 
m
(molar conductivity at
zero concentration or infinite
dilution);
·
enunciate Kohlrausch law and
learn its applications;
·
understand quantitative aspects
of electrolysis;
·
describe the construction of some
primary and secondary batteries
and fuel cells;
·
explain 
corrosion 
as 
an
electrochemical process Objectives
Chemical reactions can be used to produce electrical energy,
conversely, electrical energy can be used to carry out chemical
reactions that do not proceed spontaneously 2
Electrochemistry
Unit
Unit
Unit
Unit2Unit
Electrochemistry
Rationalised 2023-24
32
Chemistry
Cu
Eext >1 1
e
–
Current
Cathode
+ve
Anode
–ve
Zn
Fig