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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.