Chemistry Laboratory VIII

Paper Code: 
24CCHY414
Credits: 
2
Contact Hours: 
60.00
Max. Marks: 
100.00
Objective: 

This course will enable the students to

develop advanced hands on experience in the operation of conductivity meter and potentiometer.

 

Course Outcomes: 

Course

Learning Outcome

(at course level)

Learning and Teaching Strategies

Assessment Strategies

Course Code

Course

Title

 

24CCHY414

 

 

Chemistry Laboratory VIII

(Practical)

 

CO84: Calibrate and operate instruments to perform the experiments based on conductance and potential measurement.

CO85: Acquire hands-on expertise in performing experiments for analyzing kinetics of a chemical reaction.

CO86: Perform scientific experiments as well as accurately record experimental data and analyze the results of such experiments.

CO87: Compile and report the results efficiently, and develop communications skills.

CO88: 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: 

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 method:
    • Iodide-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.

 

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.

 

Essential Readings: 
  1. Advanced Practical Physical Chemistry, Eighteenth Edition; J.B. Yadav; ‎ Krishna Prakashan Media, Meerut, 2015.

 

References: 
  1. Experimental Physical Chemistry, First Edition; V. D. Athawale, P. Mathur; New age International (P) Ltd. Publishers, New Delhi, 2011.
  2. Experimental Physical Chemistry, R. C. Das and B. Behera; Tata Mc-Graw Hill publishing Co.     Pvt. Ltd., 1993.

e-Resources:

  1. https://www.youtube.com/watch?v=8Op4XjLERj8 (Kinetics)
  2. https://vlab.amrita.edu/?sub=3&brch=193&sim=352&cnt=1 (Conductometric titration)

 

Academic Year: 
2024-2025
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