ENGINEERING CHEMISTRY
LABORATORY MANUAL-I & II
For Students of First Year B.E/B.Tech
(Common to All Branches)
As Per the Anna University Syllabus - Regulation 2013.
Dr. S. Daisylin Anbu Sujitha, M.Sc., Ph.D.,
Assistant Professor, Department of Chemistry,
Sri Sairam Institute of Technology,
West Tambaram, Chennai - 600 044.
S. Shanthi, M.Sc., M.Phil., Ph.D.,
Assistant Professor, Department of Chemistry,
Anand Institute of Higher Technology,
Kalasalingam Nagar, Chennai - 603 103.
No.23/15, ‘O’ 1A-Block, Ground Floor, Agastheir Nagar Extn.,
Villivakkam, Chennai-600 049.
Contact : 9080505073, 9444421457, 9994784517
srimaruthipub@gmail.com
(i)
No part of this publication may be reproduced or distributed in any form or by
means, electronic, mechanical, photocopying, recording, or otherwise stored in a
database or retrieval system without the prior written permission of this publishers.
Information contained in this work has been obtained by Sri Maruthi Publishers
from sources believed to be reliable. However neither Sri Maruthi Publishers nor
its authors guarantee the accuracy or completeness of any information published and
they shall not be responsible for any errors arising out of this information. This
publication aims to supply information but not to be understood as a professional
service.
© Copyright 2010 by Sri Maruthi Publishers, Chennai.
First Edition
: July 2010
Revised Edition : July 2011
Revised Edition : July 2012
New Edition
: July 2013
Revised Edition : July 2014
Printed in INDIA
Engineering Chemistry Laboratory Manual - I & II
ISB : 978-93-80757-07-0
Price : Rs. 160/Published by :
Sri Maruthi Publishers, Chennai
Credits:
Team Coordinator
: M. Muthukumar, K. Murugan
Laser Typesetting
: Sri Maruthi Publishers
Wrapper designed by
: Sri Maruthi Publishers
Printed by
: Sri Maruthi Offset, Chennai.
(ii)
PREFACE
Authors have great pleasure in presenting the first edition of the
book, Engineering Chemistry Laboratory Manual, for B.E/B.Tech
degree course of the First Year Engineering Students of Anna University
Chennai.
The Book deals with both Volumetric analysis and Physical
Chemistry Experiments. Before starting the experiments, the students
are advised to go through the procedure given in the book atleast
once, in order to carry out the experiments with perfect understanding.
All the experiments have been carried out in the laboratory and
the procedure are found practically verified.
Neat Diagrams of various types of apparatus normally used in the
Chemistry Laboratory are given at the appropriate place.
Suggestions for improving the book are most welcome.
- Authors
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ACKNOWLEDGEMENT
First of all, I thank GOD ALMIGHTY for everything.
We express our sincere gratitude to Philanthopist,
Kalvivallal Thiru. T.Kalasalingam, Chairman, Seva Ratna
Shri K. Shridharan, Secretary, Dr. S. Arivalagi, Director Anand
Institute of Higher Technology, Chennai, for their support and
encouragement.
We extremely thankful to the principal Dr. T.A. Raghavendran
for permitting us to write this Lab Manual. We would like to put on record
our sincere gratitude to Dr. S. Chokkalingam, HOD Chemistry
Department, Anand Institute of Higher Technology, Chennai for giving a
valuable suggestion to write this lab manual.
We thank our colleagues and friends for their inspirations.
We deeply acknowledge our Family Members for their never
ending encouragement, moral support and patience on all our endeavors.
We wish to thank to Sri Maruthi Publishers for the sustained
interest shown by them during the entire work.
S. Shanthi
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GENERAL INSTRUCTIONS

Be punctual.

Bring manual, record notebook, calculator etc.

Maintain discipline and cleanliness in the laboratory.

Handle the apparatus and reagent bottles with almost care.

Report, breakage of glasswares to the laboratory Assistant
immediately.

Keep the reagent bottles in their respective places after use.

Do not misplace the stoppers of the bottle.

Do not throw waste paper, match - stick, broken glasswares etc.,
inside the sink; put them into the dust bin.

Do not discharge concentrated acid into the sink, dilute it before
discharging.

In case of accident, inform the faculty immediately

Before taking any liquid in the burette or the pipette, these should
be rinsed with the liquid.

The conical flask should not be rinsed with any liquid. It should
simply be washed with distilled water.

Read the lower meniscus in case of colourless liquids and the
upperone in the case of coloured liquids.

The solution should be filled in the burette by means of a funnel
which must be removed before titrations.

The readings should be entered immediately in the practical
note-book and not on some piece of paper.

When the experimental is over, wash all the glasswares and
handover to the laboratory assistant before you leave the lab.
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PERIODIC TABLE
The periodic table of the chemical elements (also known as the
periodic table or periodic table of the elements) is a tabular display of the
118 known chemical elements organized by selected properties of their atomic
structures. Elements are presented by increasing atomic number, the number
of protons in an atom’s atomic nucleus. While rectangular in general outline,
gaps are included in the horizontal rows (known as periods) as needed to
keep elements with similar properties together in vertical columns (known
as groups), e.g. alkali metals, alkali earths, halogens, noble gases.
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ANNA UNIVERSITY SYLLABUS
Common to all B.E./B.Tech Degree Students
Code : GE6163
L
0
CHEMISTRY LABORATORY-I
LIST OF EXPERIMENTS
T
0
P
2
C
1
(Any FIVE Experiments)
1.
Determination of DO content of water sample by Winkler’s method.
2.
Determination of chloride content of water sample by argentometric method
3.
Determination of strength of given hydrochloric acid using pH meter
4.
Determination of strength of acids in a mixture using conductivity meter
5.
Estimation of iron content of the water sample using spectrophotometer
(1,10- phenanthroline / thiocyanate method)
6.
Determination of molecular weight of polyvinylalcohol using Ostwald viscometer
7.
Conductometric titration of strong acid vs strong base
TOTAL: 30 PERIODS
Code : GE6262
CHEMISTRY LABORATORY -II
(Any FIVE Experiments)
L
0
T
0
P
2
C
1
1.
Determination of alkalinity in water sample
2.
Determination of total, temporary & permanent hardness of water by EDTAmethod
3.
Estimation of copper content of the given solution by EDTA method
4.
Estimation of iron content of the given solution using potentiometer
5.
Estimation of sodium present in water using flame photometer
6.
Corrosion experiment – weight loss method
7.
Conductometric precipitation titration using BaCl2 and Na2SO4
8.
Determination of CaO in Cement.
TOTAL: 30 PERIODS
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(viii)
Content
Code:GE6163
Sl.
No.
CHEMISTRY LABORATORY - I
Date
Page Marks
No.
Experiment
1.
Determination of Do Content of Water Sample by
Winkler’s Method.
3
2.
Determination of Chloride Content of Water Sample
by Argentometric Method.
9
3.
Determination of Strength of given Hydrochloric Acid
using pH Meter.
Determination of Strength of Acids in a Mixture
using Conductivity Meter.
Determination of IRON of the Water Sample using
Spectrophotometer (Using ThioCyanate).
15
6.
Determination of Molecular Weight
Polyvinylalcohol using Ostwald Viscometer.
of
33
7.
Conductometric Titration of Strong Acid Vs strong
Base.
41
SHORT PROCEDURE
45
4.
5.
Code:GE6262
Sl.
No.
Sign
21
27
CHEMISTRY LABORATORY - II
Date
Experiment
Page Marks
No.
1.
Estimation of Alkalinity of Water
73
2.
Estimation of Hardness of Water by EDTA Method
81
3.
Estimation of Copper content of the given solution
by EDTA Method
89
4.
Estimation of Ferrous Ion by Potentiometric
Titration.
95
5.
Estimation of Sodium Present in Water using Flame
Photometer
101
6.
Corrosion Experiment Weight Loss Method
105
7.
Conductometric Precipitation Titration (BaCl2 Vs
Na2SO4)
109
SHORT PROCEDURE
115
VIVA-VOCE
136
(ix)
Sign
IMPORTANT TERMS IN VOLUMETRIC ANALYSIS
Titration:
The process of finding out the volume of one of the solution required to react
completely with the definite volume of other solution.
Titrant:
The Solution of known strength.
Titrate:
The solution which contains a substance whose strength is to be estimated.
Indicator:
The substance which indicates the end point of titration is called indicator. The
indicator indicates the completion of reaction by change in colour at the end point.
eg: Phenolphthalein for acid base titration.
Strength:
The amount of substance dissolved in one litre of a solution expressed in termed
as strength of a solution. Strength of solution can also be expressed in any of the
following ways.
i. Normality:
It is the number of gram equivalents of the substance dissolved per litre of the
solution. It is denoted by N.
N
=
Weight of solute per litreof the solution
Equivalent weight of the solute
ii. Molarity:
It is the number of moles of solute per litre of the solution. It is denoted by M.
M
=
Weight of solute per litreof the solution
Molecular weight of thesolute
(x)
iii. Molality:
It is the number of moles of the substance dissolved in 1000gm or 1kg of the
solvent. It is denoted by m.
m
=
Gramsof solute per kg of thesolvent
Molecular weight of thesolute
iv. Percentage by weight:
It is the weight in grams of a solute present in 100gms of the solution.
Percentage weight
=
Weight of solute ×100
Weight of solute weight of solvent
v. Equivalent Weight:
The equivalent weight of a substance is defined as the number of parts by weight
of it that combine with or displace one part by weight of hydrogen or eight parts by
weight of oxygen.
Equivalent weight of a metal =
Atomic weight
Valency
Equivalent weight of an acid
=
Molecular weight of an acid
Basicity of an acid
=
Molecular weight of base
Acidity of base
Equivalent weight of a base
Basicity:
It is the number of replacable hydrogen atoms in an acid.
(xi)
Acidity:
It is the number of replacable OH groups in one molecule of a base.
Standard Solution:
A solution of known concentration is known as standard solution.
Equivalent weights of Substances
Substances
Equivalent Weight
Sodium hydroxide
40
Sodium thiosulphate
248.19
Potassium dichromate
49.03
Potassium permanganate
31.60
Hydrochloric acid
36.46
Sulphuric acid
49.04
Nitric acid
63
Acetic acid
60
hhhhh
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