Coming soon
Chemistry Laboratory XII
Course Objective(s):
This course will enable the students to –
develop experimental skills of various instruments and apply to perform the experiments based on phase equilibrium, thermochemistry and Lambert-Beer law.
Course Outcomes (COs):
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Course Outcomes |
Teaching Learning Strategies |
Assessment Strategies |
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On completion of this course, the students will be able to- CO117: calibrate and operate a variety of scientific instrument to perform observations related to the experiment. CO118: explain the principles behind the experiments performed in the lab and calculate these values (stability constant, pKa value, partial molar volume) CO119: perform experiments based on colloidal and surface chemistry, thermochemistry, phase equilibria and spectrophotometry. CO120: perform scientific experiments as well as accurately record experimental data with proper significant figure and analyze the results of such experiments. |
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Minor Experiments:
1. To determine the lattice energy of calcium chloride from its heat of solution using Born-Haber cycle. Provided the enthalpy changes for Ca+2 (g) → Ca(g), 2Cl- (g) → 2Cl (g), Ca (g) → Ca (s), 2Cl (g) → Cl2 (g) and Ca (s) + 2Cl (g) → CaCl2 (s) are -451.1, 174.3, -38.8, -58.0 and -190.0 Kcal/mole respectively.
2. To determine the concentration of given solution of sulphuric acid by measuring heat changes during dilution.
3. To determine the partial molar volumes of a salt (NaCl) and water system at 250C for aqueous solution of the salt at several concentrations below 3 M.
4. To determine the molar volume of ethanol and its partial molar volume at 250C in dilute aqueous solution.
5. To determine the critical micelle concentration of a surface active material by surface tension method.
6. Compare cleansing power of two samples of detergents and parachor of the mixture.
Major Experiments:
1. To determine the solubility diagram for a three component liquid system chloroform, acetic acid and water / toluene, acetic acid and water / benzene ethanol and water. To discuss the diagram in a light of phase, component and degree of freedom.
2. Nernst Distribution Law: To determine the formula of a complex ion formed between cupric ion and ammonia by distribution method.
3. To study the freezing point curve of two component simple eutectic system (acetamide-benzoic acid/naphthalene-benzoic acid)
4. To determine the stability constant and composition of FeSCN+2 complex/ Fe(III)-salicylic acid/iron-phenanthroline complex/ zirconium alizarin red-S complex by jobs method of continuous variation and mole ratio method.
5. To investigate the adsorption of oxalic acid from aqueous solutions by activated charcoal and examine the validity of classical and Langmuir’s adsorption isotherms.
- Advanced Practical Physical Chemistry, Thirtieth Edition; J. B. Yadav; Krishna Prakashan Media Pvt. Ltd., Meerut, 2015.
- Experimental Physical Chemistry, First Edition; V. D. Athawale and P. Mathur; New age International (P) Ltd. Publishers, New Delhi, 2011.
SUGGESTED READINGS:
- Experiments in Physical Chemistry, Fifth Edition; D. P. Shoemaker, C. W. Garland and J. W. Nibler, Mc Graw-Hill, New York, 1998.
- Introductory Practical Physical Chemistry, D. T. Burns and E. M. Rattenbury, Pergamon Press, 1966.
e-RESOURCES:
- https://chemcollective.org/chem/fau/gc28n.html
- https://www.youtube.com/supported_browsers?next_url=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3D8-wqRvqnGFY (Freezing Point Depression: Benzoic Acid- Lauric Acid Freezing point Lab Simulation - YouTube)
- The Phase Diagram of a Three Component System: Water, 1-Butanol and Acetic Acid - Bing video
Scheme of Examination
The duration of the examination will be 6 hrs.
The following exercises will be set in the examinations
One Major / two minor experiments 55marks Viva 15 marks
Total 70 marks
1.Physical Chemistry Experiment
The exercise carries 55 marks. Two minor experiments or one major experiment will be given to perform. Eight marks shall be awarded for preparatory work, setting up of an apparatus, neat and methodical work. The remaining 47 marks will be awarded for correct observation, use of correct formula, calculation and result within permissible limits as follows:
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- Theory and procedure 10 marks
- Correct observation and proper recording 15 marks
- Use of correct formula and calculation 14 marks
- Result 08 marks
The permissible limit will be decided by the examiner as it varies with the nature of the experiment.
2.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.
