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Dr. S. Daisylin Anbu Sujitha, M.Sc., Ph.D.,

Assistant Professor, Department of Chemistry,Sri Sairam Institute of Technology,

West Tambaram, Chennai - 600 044.

No.23/15, ‘O’ 1A-Block, Ground Floor, Agastheir Nagar Extn.,Villivakkam, Chennai-600 049.

Contact : 9080505073, 9444421457, 9994784517srimaruthipub@gmail.com

As Per the Anna University Syllabus - Regulation 2013.

For Students of First Year B.E/B.Tech

(Common to All Branches)

S. Shanthi, M.Sc., M.Phil., Ph.D.,

Assistant Professor, Department of Chemistry,Anand Institute of Higher Technology,

Kalasalingam Nagar, Chennai - 603 103.

ENGINEERING CHEMISTRYLABORATORY MANUAL-I & II

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No part of this publication may be reproduced or distributed in any form or bymeans, electronic, mechanical, photocopying, recording, or otherwise stored in adatabase or retrieval system without the prior written permission of this publishers.

Information contained in this work has been obtained by Sri Maruthi Publishersfrom sources believed to be reliable. However neither Sri Maruthi Publishers norits authors guarantee the accuracy or completeness of any information published andthey shall not be responsible for any errors arising out of this information. Thispublication aims to supply information but not to be understood as a professionalservice.

© 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

Team Coordinator : M. Muthukumar, K. Murugan

Laser Typesetting : Sri Maruthi Publishers

Wrapper designed by : Sri Maruthi Publishers

Printed by : Sri Maruthi Offset, Chennai.

Credits:

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Authors have great pleasure in presenting the first edition of thebook, Engineering Chemistry Laboratory Manual, for B.E/B.Techdegree course of the First Year Engineering Students of Anna UniversityChennai.

The Book deals with both Volumetric analysis and PhysicalChemistry Experiments. Before starting the experiments, the studentsare advised to go through the procedure given in the book atleastonce, in order to carry out the experiments with perfect understanding.

All the experiments have been carried out in the laboratory andthe procedure are found practically verified.

Neat Diagrams of various types of apparatus normally used in theChemistry Laboratory are given at the appropriate place.

Suggestions for improving the book are most welcome.

- Authors

PREFACE

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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 AnandInstitute of Higher Technology, Chennai, for their support andencouragement.

We extremely thankful to the principal Dr. T.A. Raghavendran

for permitting us to write this Lab Manual. We would like to put on recordour sincere gratitude to Dr. S. Chokkalingam, HOD ChemistryDepartment, Anand Institute of Higher Technology, Chennai for giving avaluable suggestion to write this lab manual.

We thank our colleagues and friends for their inspirations.

We deeply acknowledge our Family Members for their neverending encouragement, moral support and patience on all our endeavors.

We wish to thank to Sri Maruthi Publishers for the sustainedinterest shown by them during the entire work.

S. Shanthi

ACKNOWLEDGEMENT

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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 Assistantimmediately.

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 beforedischarging.

In case of accident, inform the faculty immediately

Before taking any liquid in the burette or the pipette, these shouldbe rinsed with the liquid.

The conical flask should not be rinsed with any liquid. It shouldsimply be washed with distilled water.

Read the lower meniscus in case of colourless liquids and theupperone in the case of coloured liquids.

The solution should be filled in the burette by means of a funnelwhich must be removed before titrations.

The readings should be entered immediately in the practicalnote-book and not on some piece of paper.

When the experimental is over, wash all the glasswares andhandover 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 theperiodic table or periodic table of the elements) is a tabular display of the118 known chemical elements organized by selected properties of their atomicstructures. Elements are presented by increasing atomic number, the numberof protons in an atom’s atomic nucleus. While rectangular in general outline,gaps are included in the horizontal rows (known as periods) as needed tokeep elements with similar properties together in vertical columns (knownas 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

L T P C0 0 2 1

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 : GE6163

CHEMISTRY LABORATORY -II(Any FIVE Experiments)

1. Determination of alkalinity in water sample

2. Determinationof total, temporary& permanenthardnessofwater byEDTAmethod

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 Na2SO

4

8. Determination of CaO in Cement.TOTAL: 30 PERIODS

CHEMISTRY LABORATORY-ILIST OF EXPERIMENTS

(Any FIVE Experiments)

L T P C0 0 2 1

Code : GE6262

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Sl.No.

Experiment PageNo.

Marks Sign

1.

2.

3.

4.

5.

6.

7.

3

9

15

21

27

33

41

45

Date

Content

Determination of Do Content of Water Sample byWinkler’s Method.

Determination of Chloride Content of Water Sampleby Argentometric Method.

Determination of Strength of given Hydrochloric Acidusing pH Meter.

Determination of Strength of Acids in a Mixtureusing Conductivity Meter.

Determination of IRON of the Water Sample usingSpectrophotometer (Using ThioCyanate).

Determination of Molecular Weight ofPolyvinylalcohol using Ostwald Viscometer.

Conductometric Titration of Strong Acid Vs strongBase.

SHORT PROCEDURE

Code:GE6163 CHEMISTRY LABORATORY - I

Sl.No.

Experiment PageNo.

Marks Sign

1.

2.

3.

4.

5.

6.

7.

73

81

89

95

101

105

109

115

136

Date

Estimation of Alkalinity of Water

Estimation of Hardness of Water by EDTA Method

Estimation of Copper content of the given solutionby EDTA Method

Estimation of Ferrous Ion by PotentiometricTitration.

Estimation of Sodium Present in Water using FlamePhotometer

Corrosion Experiment Weight Loss Method

Conductometric Precipitation Titration (BaCl2

VsNa

2SO

4)

SHORT PROCEDURE

VIVA-VOCE

Code:GE6262 CHEMISTRY LABORATORY - II

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Titration:

The process of finding out the volume of one of the solution required to reactcompletely 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. Theindicator 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 termedas strength of a solution. Strength of solution can also be expressed in any of thefollowing ways.

i. Normality:

It is the number of gram equivalents of the substance dissolved per litre of thesolution. It is denoted by N.

N =Weight of solute per litreof thesolution

Equivalent weight of thesolute

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 thesolution

Molecular weight of thesolute

IMPORTANT TERMS IN VOLUMETRIC ANALYSIS

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iii. Molality:

It is the number of moles of the substance dissolved in 1000gm or 1kg of thesolvent. 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 =Weightof 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 weightof it that combine with or displace one part by weight of hydrogen or eight parts byweight of oxygen.

Equivalent weight of a metal =Atomic weight

Valency

Equivalent weight of an acid

=Molecular weight of an acid

Basicity of an acid

Equivalent weight of a base

=Molecular weight of base

Acidity of base

Basicity:

It is the number of replacable hydrogen atoms in an acid.

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Sodium hydroxide

Sodium thiosulphate

Potassium dichromate

Potassium permanganate

Hydrochloric acid

Sulphuric acid

Nitric acid

Acetic acid

40

248.19

49.03

31.60

36.46

49.04

63

60

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

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Substances Equivalent Weight