molar conductance

In most of the Pre-University Chemistry textbooks,
the definitions of conductivity and molar
conductivity are presented in an understandable
and well-formulated way. However the authors
own teaching experiences reveal that many preuniversity
students do not understand the real
physical meanings of conductivity and molar
conductivity and even confuse the difference
between the two terms. The purpose of this article
is therefore to introduce a more basic concept
and to give certain physical meanings for the
conductivity, molar conductivity and molar conductivity
at infinite dilution.
What causes the conductivity of an aqueous
solution?
To answer the above question, we might first
think what would happen to the electrolytes
regardless of whether they are strong or weak,
when placed in water. In fact, interactions of
various particles would take place. These include
(i) interaction of compound with polar water
molecules,
(ii) interaction of ions with water molecules
(hydration effect), and
(iii) interaction of ions themselves.