Coming soon
CHEMISTRY LABORATORY II
Course Objective(s):
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):
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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– CO14: determine the percentage composition of non interacting systems by viscosity and surface tension method. CO15: interpret powder diffraction pattern. CO16: perform titration between acid and base using pH meter. |
instructions and demonstrations
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- 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.
- Advanced Practical Physical Chemistry, Eighteenth Edition; J.B. Yadav; Goel Publishing House, Meerut, 2015.
- Advanced University Practical Chemistry, Part I, First Edition; P.C. Kamboj, Vishal Publishing House, New Delhi; 2016.
SUGGESTED READINGS:
- Experimental Physical Chemistry; First Edition; V. D. Athawale, P. Mathur; New Age International (P) Ltd. Publishers, New Delhi, 2011.
- Experiments in Physical Chemistry; Eight Edition; J.W. Nibler, & D. P. Shoemaker; McGraw-Hill: New York, 2003.
e-RESOURCES:
- https://www.fpharm.uniba.sk/fileadmin/faf/Pracoviska-subory/KFCHL/ENG/lectures/Physics/ AP11__Surface_tension.pdf (surface tension)
- https://vlab.amrita.edu/index.php?sub=2&brch=190&sim=339&cnt=1 (viscosity)
- https://chemcollective.org/chem/jsvlab/(pH-metry)
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.
