Physical Chemistry Lab II

Paper Code: 
CHY 328
Credits: 
3
Contact Hours: 
90.00
Max. Marks: 
100.00
Objective: 

Course Objectives :

The course aims to develop advanced hands on experience in the operation of conductivity meter, dropping mercury electrode and potentiometer. Acquire the knowledge of basic terminology regarding conductance, chemical kinetics, adsorption, polarography and potentiometry.

Course Outcomes (Cos):                                                                        

COURSE

Learning outcomes (at course level)

Learning and teaching strategies

Assessment Strategies

Paper Code

Paper Title

CHY 328

Physical Chemistry Lab II

 The students will be able to-

 

CO117-acquire knowledge of safe laboratory practice by handling laboratory glasswares, equipments, instruments and chemical reagents.

CO118-prepare standard solutions.

CO119-understand the principle behind the experiments performed in the lab.

CO120-predict the kinetics of different reactions.

CO121-verify the Onsagar equation experimentally and apply it for determination of equivalent conductance of weak and strong electrolytes.

CO122-perform scientific experiments as well as accurately record experimental data and analyze the results of such experiments.

Interactive Lectures

 

Discussions

 

Demonstrations

 

Written test

 

Viva Voce

 

Semester End Exam

 
 

 

Unit I: 

A list of experiments under different heading is given below. Students are required to perform atleast 8-10 experiments.

 

Chemical Kinetics

  1. To determine the effect of (a) change of temperature (b) change of concentration of reactants and (c) catalysts on the velocity constant of hydrolysis of an ester.
  2. To study the kinetics of the reaction between K2S2O8 (potassium persulphate) and KI (potassium iodide) and to determine the rate constant and the energy of activation of the reaction.
  3. To determine of primary salt effect in the kinetics of ionic reaction and to test the Bronsted relationship (Iodide ion is oxidized by persulphate ion).
  4. To study the kinetics of saponification of ethyl acetate by sodium hydroxide and to determine the rate constant.
  5. To determine the rate constant, energy of activation and entropy of activation in the oxidation of benzyl alcohol (C6H5CH2OH) by potassium permanganate in acidic medium.
  6. To determine the formation constant for the (Ce+4-H3PO2) intermediate complex and its decomposition rate constant at the room temperature.
  7. To determine the rate constant for the bleaching of malachite green in basic medium at room temperature spectrophotometrically.
  8. To determine the rate constant, order of reaction and energy of activation for saponification of ethyl acetate using NaOH conductometrically.

 

Electrochemistry

  1. To estimate the concentration of H2SO4, CH3COOH and CuSO4 by conductometric titration using NaOH solution.
  2. To determine equivalent conductance of the strong electrolytes (KCl, HNO3, HCl etc.) at several concentrations and to verify the Onsagar’s equation and find the values of a and b in the equation.
  3. To determine the equivalent conductance of acetic acid at infinite dilution and to calculate its degree of dissociation at different dilutions as well as dissociation constant at the room temperature.

 

Potentiometry

  1. To determine the concentration of ferrous ion in the given solution by titrating against N/10 Cr2O72- or Ce+4 ion solution and also determine the equivalence point by plotting E vs. V, ∆E vs. ∆V and ∆2E/∆V2 vs. ∆V.

 

Polarography

i  To determine the half wave potentials of Cd+2 and Zn+2 ions in 0.1 M KCl solution and to show that half wave potential is independent of the concentration.

 

Adsorption

  1. To study the adsorption of acetic acid or oxalic acid from aqueous solution by activated charcoal or animal charcoal and to examine the validity of Freundlich and Langmuir adsorption isotherms.
  2. To compare cleansing power of samples of two detergents.
  3. To study the variation of surface tension of solution of n-propyl alcohol with concentration and to determine the limiting cross section area of alcohol molecule.
  4. To determine the radius of molecule by viscosity measurements (e.g. Glycerol)
References: 
  • Advanced Practical Physical Chemistry; Thirtieth Edition; J. B. Yadav; Krishna Prakashan Media Pvt. Ltd., Meerut, 2011.
  • 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.
  • Experiments in Physical Chemistry; Fifth Edition, D. P. Shoemaker, C. W. Garland and J. W. Nibler,  Mc Graw-Hill, New York, 1998.
  • Introductory Practical Physical Chemistry; D. T. Burns  and E. M. Rattenbury, Pergamon Press, 1966
 
Academic Year: 
2020-2021
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