Chemistry Laboratory II

Paper Code: 
24CCHY 114
Credits: 
2
Contact Hours: 
60.00
Max. Marks: 
100.00
Objective: 

This course will enable the students to

learn about pH measurement, surface tension and viscosity measurement of liquid pH-metric titrations of acids and bases.

 

Course outcomes (COs):

 

Course

Learning Outcome

(at course level)

Learning and Teaching Strategies

Assessment Strategies

Course Code

Course

title

 

24CCHY 114

 

 

Chemistry Laboratory II

(Practical)

 

CO18: Determine the percentage composition of non interacting systems by viscosity and surface tension method.

CO19: Interpret powder diffraction pattern.

CO20: Operate pH meter and apply the knowledge of pH measurement to perform the experiments based on pH-metry.

CO21: Perform scientific experiments as well as accurately record experimental data and analyze the results of such experiments.

CO22: Compile and report the results efficiently, and develop communications skills.

CO23: Contribute effectively in course-specific interaction.

Approach in teaching:

Power point presentation, 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.

 

 

 

Unit I: 

Surface tension measurements

  • Determine the surface tension by (i) drop number (ii) drop weight method.
  • Study the variation of surface tension of detergent solutions with concentration.

 

Viscosity measurement using Ostwald’s viscometer

  • Determination of viscosity of aqueous solutions of (i) polymer (ii) ethanol and (iii) sugar at room temperature.
  • Study the variation of viscosity of sucrose solution with the concentration of solute.

 

Indexing of a given powder diffraction pattern of a cubic crystalline system

 

pH-metry

  • Study the effect on pH of addition of HCl/NaOH to solutions of acetic acid, sodium acetate and their mixtures.
  • Preparation of buffer solutions of different pH
    • Sodium acetate-acetic acid
    • Ammonium chloride-ammonium hydroxide
  • pH metric titration of
    • Strong acid vs strong base
    • Weak acid vs strong base
    • Determination of dissociation constant of a weak acid.

 

Any other experiment related to prescribed topic can be carried out in the class.

 

Scheme of Examination

 

The duration of examination will be 5 hrs.

The following exercises will be set in the examination

Physical Chemistry Experiment (two)

Experiment I                                                                             27 marks

Experiment II                                                                            28 marks

Viva                                                                                          15 marks

Total                                                                                        70 marks

 

The exercise carries 27 marks / 28 marks. The exercises in Physical chemistry can be modified by the examiners and the same will be explained to the candidates. However, such modifications will not involve any departure from the basic principles over which experiments are prescribed in the syllabus.

Candidates shall be given two exercise out of the exercises prescribed in the syllabus. 4 marks shall be awarded for preparatory work, setting up of an apparatus, neat and methodical work.

23 / 24 marks will be awarded for theory and procedure, correct observation and proper recording, use of correct formula, calculation and result within permissible limits. The distribution of marks will be as follows:

 

 

Theory and procedure                                                            6 marks

Correct observation and proper recording                                5 marks

Use of correct formula and calculation                                     6 marks

Result                                                                                  6 marks / 7 marks

 

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

 

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, Eighteenth Edition; J.B. Yadav; Goel Publishing House, Meerut, 2015.
  2. Advanced University Practical Chemistry, Part I, First Edition; P.C. Kamboj, Vishal Publishing House, New Delhi; 2016.

 

References: 
  1. Experimental Physical Chemistry; First Edition; V. D. Athawale, P. Mathur; New Age International (P) Ltd. Publishers, New Delhi, 2011.
  2. Experiments in Physical Chemistry; Eight Edition; J.W. Nibler, & D. P. Shoemaker; McGraw-Hill: New York, 2003.

e-Resources:

 

  1. https://www.fpharm.uniba.sk/fileadmin/faf/Pracoviska-subory/KFCHL/ENG/lectures/Physics/ AP11__Surface_tension.pdf (surface tension)
  2. https://vlab.amrita.edu/index.php?sub=2&brch=190&sim=339&cnt=1 (viscosity)
  3. https://chemcollective.org/chem/jsvlab/(pH-metry)

 

Academic Year: 
2024-2025
  • Printer-friendly version
  • PDF version