This document provides an overview of conductometry and conductometric titrations. It defines conductometry as measuring the conductivity of ionic solutions caused by ion mobility in an electric field. Conductance is the ability of a substance to conduct electricity and is the inverse of resistance. Conductometric titration uses changes in electrolytic conductivity upon continuous titrant addition to identify the concentration of an analyte. The principle is that cations and anions have varying conductance values, so the overall conductance after titrant addition depends on whether a reaction occurs. If no reaction occurs, conductivity increases as all ions contribute, but a reaction causes a sudden change indicating the stoichiometric point.

1. CONDUCTOMETRY
Lecture- 2
Subject – Pharmaceutical Analysis-I
Course – B. Pharm 1st Year
Faculty Name – Umesh Kumar

2. Unit- V

3. Contents
 Conductometry
◦ Introduction
◦ Conductance
 Conductometric Titrations
◦ Titrations
◦ Types
 Principle of conductrometry

4. Conductometry

5. 1. Conductometry
 Conductometry means measuring the
conductivity of ionic solutions caused
by mobility of ions towards respective
electrodes in presence of an electric
field.
 Conductivity is measured by using
conductometer.
 Units of conductivity is Ω-1.

6. 1.1Conductance
 Conductance (also known as
electrical conductance) is defined
as the potential for a substance to
conduct electricity.
 Conductance is the measure of how
easily electrical current (i.e. flow of
charge) can pass through a material.
 Conductance is the inverse (or
reciprocal) of electrical resistance,
represented as 1/R.

7.  Titration
o When a reagent with known
concentration (Titrant)react with
unknown concentration of analyte
(Tirand)to find out the concentration
of analyte, the process is called
titration.
 Types
o Neutralization titrations
o Non aqous titrations
o Precipitation titrations
o Redox titrations
o Complex metric Titration
Conductometric Titrations-

8. Conductometric Titrations-
 Conductometric titration is a laboratory method of
quantitative analysis used to identify the concentration
of a given analyte in a mixture.
 In this type of titration, upon the continuous addition of
the titrant (and the continuous recording of the
corresponding change in electrolytic conductivity), a
sudden change in the conductivity implies that the
stoichiometric point has been reached.

9. Principle of Conductometry
 Cations and anions have varying degree of ionic
conductance value.
 Thus, when a electrolyte is added (as a titrant) to the
solution of another electrolyte the overall conductance
(after addition) will depend whether a reaction occurs or
not.
 If no chemical reaction occurs between the electrolyte
solution and another added to it, the overall conductance
of the solution will increase. Because all ions will
contribute to the conductance.