Chemistry Laboratory II

Paper Code: 
C-CHY 202
Credits: 
2
Contact Hours: 
60.00
Max. Marks: 
100.00
Objective: 

Course Objective(s):
This course will enable the students to -

  • extend the concepts of thermochemistry in calculating the thermodynamic parameters for different systems using suitable techniques
  • develop a perspective towards the synthesis of some organic compounds and their purification.

Course Outcomes (COs):

Course Outcomes

Teaching Learning Strategies

Assessment Strategies

  

On completion of this course, the students will be able to –

CO15: measure enthalpy of neutralization, ionization and hydration for different acid-base combinations.

CO16: determine the solubility of benzoic acid.

CO17: apply the knowledge of pH measurement to perform the experiments based on pH-metry

CO18: synthesize some organic compounds and check their melting points and purity after recrystallisation

•    Laboratory instructions and Demonstrations
 

•  Conduction of Experiments
•    Lab Records
•    Viva voce
 

 

  

 

 

30.00
Unit I: 

Physical Chemistry

Minor Experiments:

1. Determination of heat capacity of calorimeter for different volumes.
2. Measurement of pH of different solutions like aerated drinks, fruit juices, shampoos and soaps (use dilute solutions of soaps and shampoos to prevent damage to the glass electrode) using pH-meter.

Major Experiments:

1. Determination of enthalpy of neutralization of hydrochloric acid with sodium hydroxide.

2. Determination of enthalpy of ionization of acetic acid.

3. Determination of integral enthalpy of solution of salts (KNO3, NH4Cl).

4. Determination of enthalpy of hydration of copper sulphate.

5. Study of the solubility of benzoic acid in water at different temperatures and determination of ΔH.

6. Preparation and measurement of the pH of the following buffer solutions and comparison with theoretical values

(i) Sodium acetate-acetic acid

           (ii) Ammonium chloride-ammonium hydroxide

 

30.00

Organic Chemistry

1. Purification of organic compounds by crystallization (from water and alcohol) and distillation.

2. Criteria of purity: Determination of melting and boiling points.

3. Preparations: Mechanism of various reactions involved to be discussed. Recrystallisation, determination of melting point and calculation of quantitative yields to be done.

(a) Bromination of phenol/aniline

(b) Benzoylation of amines/phenols

(c) Oxime and 2,4-dinitrophenylhydrazone of aldehyde/ketone

Any other experiment related to above topics may also be carried out in the lab.

Essential Readings: 
  • Advanced Practical Physical Chemistry, Eighteenth Edition; J.B. Yadav; Krishna Prakashan Media, Meerut, 2015.
  • Textbook of Practical Organic Chemistry, 5th edition; A.I. Vogel, A.R. Tatchell, B.S. Furnis,  A.J. Hannaford & P.W.G. Smith; Prentice-Hall, 1996.
References: 

SUGGESTED READINGS:

  • Experimental Physical Chemistry, First Edition; V. D. Athawale, P. Mathur; New Age International (P) Ltd. Publishers, New Delhi, 2011.
  • Practical Organic Chemistry, Fourth Edition; F.C. Mann, B.C. Saunders; Pearson Education Ltd., New Delhi, 2013.
  • Advanced University Practical Chemistry, Part I, First Edition; P.C. Kamboj, Vishal Publishing House, New Delhi; 2016.

e-RESOURCES:

 

Scheme of Examination

 

The duration of examination will be 4 hrs.

The following exercises will be set in the examinations

Organic Synthesis                                                                      18 marks

Physical Chemistry – Minor                                                         12 marks

Physical Chemistry – Major                                                         28 marks

Viva                                                                                         12 marks

Total                                                                                       70 marks

 

1.Organic Synthesis

This exercise carries 18 marks. Four marks out of 18 are reserved for neat, methodical and systematic working. The exercise amongst the candidates will be allotted by lot.

The yield, purity, crystallization and recording of M. pt. and proper presentation of the compound shall be taken into account while awarding marks.

 

2.Physical Chemistry Experiment:

Minor experiment

The exercise carries 12 marks. One minor experiment by lot will be given to perform. Three marks shall be awarded for preparatory work, setting up of an apparatus, neat and methodical work.

09 marks will be awarded for correct observation, use of correct formula, calculation and result within permissible limits as follows:

 

  • Theory and procedure                                                                  2 marks
  • Correct observation and proper recording                                   3 marks
  • Use of correct formula and calculation                                        2 marks
  •  Result                                                                                           2 marks

Major experiment

The exercise carries 28 marks. One major experiment by lot will be given to perform. Four marks shall be awarded for preparatory work, setting up of an apparatus, neat and methodical work.

24 marks will be awarded for correct observation, use of correct formula, calculation and result within permissible limits as follows:

  • Theory and procedure                                                                  6 marks
  • Correct observation and proper recording                                   6 marks
  • Use of correct formula and calculation                                        6 marks
  • Result                                                                                           6 marks

The permissible limit will be decided by the examiner as it varies with the nature of the experiment.

3.Viva

Oral questions shall generally be asked over the work assigned to the candidate. The purpose is to find out as to what extent the candidate has understood the basic principles.

 

 

 

Academic Year: 
2023-2024
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