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 |
Learning Outcome (at course level) |
Learning and Teaching Strategies |
Assessment Strategies |
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Course Code |
Course Title |
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24CCHY 202 |
Chemistry Laboratory II (Practical)
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CO19: Measure the pH of different solutions using a pH meter. CO20: Determine different kind of enthalpies like enthalpy of neutralization, ionization, hydration and integral enthalpy of solution for different processes. CO21: Purify compounds through recrystallization and distillation, assess purity through melting and boiling point determinations. CO22: Synthesize some organic compounds and calculate their yield. CO23: Compile and report the results efficiently, and develop communications skills. CO24: Contribute effectively in course-specific interaction. |
Approach in teaching: Laboratory instructions and demonstrations.
Learning activities for the students: Peer learning, hands-on-learning, interpretation of data, record writing and learning through virtual labs.
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Conduction of experiments, lab records, viva voce and quiz. |
Physical Chemistry (30 Hours)
Minor Experiment
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
Organic Chemistry (30 Hours)
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.
Scheme of Examination
The duration of examination will be 4 hrs.
The following exercises will be set in the examinations
Organic Synthesis 20 marks
Physical Chemistry – Minor 10 marks
Physical Chemistry – Major 28 marks
Viva 12 marks
Total 70 marks
1.Organic Synthesis
This exercise carries 20 marks. 4 marks out of 20 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 10 marks. One minor experiment by lot will be given to perform. 3 marks shall be awarded for preparatory work, setting up of an apparatus, neat and methodical work.
07 marks will be awarded for correct observation, use of correct formula, calculation and result within permissible limits as follows:
Major experiment
The exercise carries 28 marks. One major experiment by lot will be given to perform. 4 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:
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.
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