Coming soon
Chemistry Laboratory IX
This course will enable the students to
understand the handling of UV-vis spectrophotometer and its use in various applications.
|
Course |
Learning Outcome (at course level) |
Learning and Teaching Strategies |
Assessment Strategies |
|
|
Course Code |
Course title |
|||
|
24CCHY513 |
Chemistry Laboratory IX
|
CO101: Apply spectrophotometric techniques to record absorbance spectra and analyze it . CO102: Estimate the concentration of a given sample using Lambert-Beer’s law. CO103: Determine the dissociation constant and interpret the kinetics of a reaction using Spectrophotometer. CO104: Perform scientific experiments as well as accurately record experimental data and analyze the results of such experiments. CO105: Compile and report the results efficiently, and develop communications skills. CO106: 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.
|
Minor Experiments
- Study the absorbance spectra of KMnO4 and K2Cr2O7 (in 0.1 M H2SO4) and determine the λmax values. Calculate the energies of the two transitions indifferent units (J molecule-1, kJ mol-1, cm-1, eV).
- Study the pH-dependence of the UV-Vis spectrum of K2Cr2O7.
- Record the 200-350 nm UV spectra of the given compounds (acetone, acetaldehyde, 2-propanol, acetic acid) in water. Comment on the effect of structure on the UV spectra of organic compounds.
- Analyse the given vibrational-rotational spectrum of HCl.
Major Experiments
- Verify Lambert-Beer’s law and determine the concentration of CuSO4/KMnO4/K2Cr2O7 in a solution of unknown concentration.
- Determine the concentrations of KMnO4 and K2Cr2O7 in a mixture spectrophotometrically.
- Study the kinetics of iodination of propanone in acidic medium. (volumetrically/spectrophotometrically)
- Determine the amount of iron present in a sample using 1,10-phenathroline spectrophotometrically.
- Determine the dissociation constant of an indicator phenolphthalein spectrophotometrically.
- Study the kinetics of interaction of crystal violet/ phenolphthalein with sodium hydroxide. (volumetrically/spectrophotometrically)
Scheme of Examination
The duration of examination will be 5 hrs.
The following exercises will be set in the examination
Minor experiment 20 marks
Major experiment 35 marks
Viva 15 marks
Total 70 marks
The candidates shall be given two exercise out of exercises prescribed in the syllabus. The exercises in physical chemistry can be modified by the examiner 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.
The distribution of marks will be as follows
Minor Major
Theory and procedure 2 marks 5 marks
Correct observation 6 marks 12 marks
Use of correct formula 2 marks 5 marks
Calculation/Interpretation 6 marks 8 marks
Results 4 marks 5 marks
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 understanding the basic principles.
- Advanced Practical Physical Chemistry, Thirtieth Edition; J. B. Yadav; Krishna Prakashan Media Pvt. Ltd., Meerut, 2015.
- Experimental Physical Chemistry, First Edition; V. D. Athawale and P. Mathur; New age International (P) Ltd. Publishers, New Delhi, 2011.
- Experiments in Physical Chemistry, Fifth Edition; D. P. Shoemaker, C. W. Garland and J. W. Nibler, Mc Graw-Hill, New York, 1998.
e-Resources:
- https://vlab.amrita.edu/?sub=2&brch=190&sim=338&cnt=1 (spectrophotometry)
- http://mas-iiith.vlabs.ac.in/List%20of%20experiments.html (kinetics, pH effect, verify Beer-Lambert’s law)
