Chemistry Laboratory XVII

Paper Code: 
24DCHY716
Credits: 
2
Contact Hours: 
60.00
Max. Marks: 
100.00
Objective: 

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: 

Course

Learning Outcome

(at course level)

Learning and Teaching Strategies

Assessment Strategies

Course Code

Course

Title

 

24DCHY716

Chemistry Laboratory XVII

         (Practical)

CO204: Calibrate and operate a variety of scientific instrument to perform observations related to the experiment.

CO205: Explain the principles behind the experiments performed in the lab and calculate these values (stability constant, pKa value, partial molar volume, rate constant, thermodynamic parameters, cmc etc.)

CO206: Compile and report the results efficiently and develop communication skills.

CO207: 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.

 

Conduction of experiments, lab Records, viva voce and  quiz.

 

Unit I: 
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.
  7. To determine the specific and molecular rotation of an optically active substance.

 

Major Experiments:

  1. To investigate the adsorption of oxalic acid from aqueous solutions by activated charcoal and examine the validity of classical and Langmuir’s adsorption isotherms.
  2. To determine the rate constant of the inversion of cane sugar in the presence of hydrochloric acid and sulphuric acid by using a polarimeter and evaluate the relative strength of the two acids.
  3. To determine the effect of (a) change of temperature (b) change of concentration of reactants and (c) catalysts on the velocity constant of hydrolysis of an ester.
  4. To study the kinetics of the reaction between K2S2O8 (potassium persulphate) and KI (potassium iodide) and to determine the rate constant and the energy of activation of the reaction.
  5. To determine the rate constant for the bleaching of malachite green in basic medium at room temperature spectrophotometrically.

 

 

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:

           

  • 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.

 

Essential Readings: 
  1. Advanced Practical Physical Chemistry, Thirtieth Edition; J. B. Yadav; Krishna Prakashan Media Pvt. Ltd., Meerut, 2015.
  2. Experimental Physical Chemistry, First Edition; V. D. Athawale and P. Mathur; New age International (P) Ltd. Publishers, New Delhi, 2011.

 

References: 
  1. Experiments in Physical Chemistry, Fifth Edition; D. P. Shoemaker, C. W. Garland and J. W. Nibler, Mc Graw-Hill, New York, 1998.
  2. Introductory Practical Physical Chemistry, D. T. Burns and E. M. Rattenbury, Pergamon Press, 1966.

 

e-Resources:

  1. https://chemcollective.org/chem/fau/gc28n.html
  2. 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)
  3. The Phase Diagram of a Three Component System: Water, 1-Butanol and Acetic Acid - Bing video

 

Academic Year: 
2024-2025
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