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CHEMISTRY LABORATORY VIII
Course Objective(s):
This course will enable the students to-
develop advanced hands on experience in the operation of conductivity meter and potentiometer.
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- CO63: calibrate and operate instruments to perform the experiments based on conductance, potentiometry and chemical kinetics. CO64: accurately records experimental data with proper significant figures and analyses such experiments results. |
instructions and demonstrations
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Minor Experiments:
Conductivity meter
- Determination of cell constant.
- Determination of equivalent conductance and degree of dissociation of weak electrolyte.
- Determination of dissociation constant of a weak acid.
- Determination of solubility and solubility product of sparingly soluble salt.
- Perform the following conductometric titrations:
- Strong acid vs strong base
- Weak acid vs strong base
- Strong acid vs weak base
- Mixture of strong acid and weak acid vs strong base
Potentiometer
- Perform the following potentiometric titrations:
- Strong acid vs strong base
- Weak acid vs strong base
- Dibasic acid vs strong base
- Potassium di chromate vs Mohr's salt
Major Experiments:
- Study the kinetics of the following reactions.
- Initial rate methodIodide-persulphate reaction
- Integrated rate method:
- Acid hydrolysis of methyl acetate with hydrochloric acid.
- Saponification of ethyl acetate.
- Compare the strengths of HCl and H2SO4 by studying kinetics of hydrolysis of methyl acetate.
- Study the kinetics of hydrolysis of ethyl acetate using NaOH by conductance measurements.
- Advanced Practical Physical Chemistry, Eighteenth Edition; J.B. Yadav; Krishna Prakashan Media, Meerut, 2015.
SUGGESTED READINGS:
- Experimental Physical Chemistry, First Edition; V. D. Athawale, P. Mathur; New age International (P) Ltd. Publishers, New Delhi, 2011.
- Experimental Physical Chemistry, R. C. Das and B. Behera; Tata Mc-Graw Hill publishing Co. Pvt. Ltd., 1993.
e-RESOURCES:
- https://www.youtube.com/watch?v=8Op4XjLERj8 (Kinetics)
- https://vlab.amrita.edu/?sub=3&brch=193&sim=352&cnt=1 (Conductometric titration)
Scheme of Examination
The duration of the examination will be 5 hrs.
The following exercises will be set in the examinations
Major experiment 35 marks
Minor experiment 20 marks
Viva 15 marks
Total 70 marks
Major Experiment
The exercise carries 35 marks. One major experiment by lot will be given to perform. 5 marks shall be awarded for preparatory work, setting up of an apparatus, neat and methodical work.
30 marks will be awarded for correct observation, use of correct formula, calculation and result within permissible limits as follows:
Theory and procedure 8 marks
Correct observation and proper recording 10 marks
Use of correct formula and calculation 10 marks
Result 2 marks
Minor Experiment
The exercise carries 20 marks. One minor 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.
16 marks will be awarded for correct observation, use of correct formula, calculation and result within permissible limits as follows:
Theory and procedure 4 marks
Correct observation and proper recording 5 marks
Use of correct formula and calculation 5 marks
Result 2 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.
